7 Signs Your WordPress Website Is Infected with Malware and How to Fix It

Have you ever felt that something was off with your WordPress website, but you could not immediately identify the problem? It might be infected with malware.

WordPress malware is one of the most dangerous security threats a website can face. What makes it worse is that many infections work silently, damaging your site without obvious warning signs.

According to a recent WPScan report, more than 70,000 websites were found to have at least one malicious file during 2023. Most infections came from weak or leaked credentials and nulled plugins.

In this article, I will cover 7 hidden signs that your WordPress site may be infected with malware, and of course, how to fix it effectively.

1. A Sudden Drop in Website Speed

One of the first signs people miss is a website that suddenly becomes very slow. If your site used to be fast but now feels like a snail, malware may be the reason.

Why does this happen? Malware often consumes server resources for harmful activity such as sending spam or joining a botnet for DDoS attacks. As a result, the server has less capacity left to run the website normally.

What to do:

1. Run a full malware scan using a trusted WordPress security plugin
2. Check CPU and memory usage in your hosting dashboard
3. Review log files for suspicious activity

2. Strange or Unusual Traffic

A sudden traffic spike or drop that you cannot explain may be another sign.

Why does this happen? Malware can cause traffic spikes through redirects or spam content. On the other hand, if Google detects malware on your site, it may lower rankings or remove the site from search results, which can cause traffic to fall sharply.

According to security research, around 43% of internet users avoid websites that are flagged as dangerous by their browser.

What to do:

1. Analyze traffic patterns in Google Analytics or another analytics tool
2. Check whether Google has flagged your site in Google Search Console
3. Use tools like Sucuri SiteCheck to scan your site online

3. Content You Did Not Create

If you discover new posts, pages, or even admin users that you did not create, that is a strong sign of malware infection.

Why does this happen? Attackers often create spam content or malicious content after gaining access to your site. They usually add new admin users so they can keep access even after the first breach is found.

What to do:

1. Audit all users and remove suspicious accounts
2. Review recently published content for links or code you do not recognize
3. Change all WordPress passwords and make sure they are strong
4. Enable two-factor authentication for all admin accounts

4. Unwanted Redirects

One of the clearest signs of infection is when visitors, or even you, get redirected to an unknown website.

Why does this happen? Malicious redirects are a common tactic used by attackers to send traffic to phishing pages, malware downloads, or adult sites. This damages both the visitor experience and your site reputation.

What to do:

1. Check your .htaccess file for suspicious redirect rules
2. Review theme template files for injected code
3. Inspect hooks inside functions.php
4. If you use cPanel, tools like Imunify360 can help monitor suspicious activity in real time

5. Spam Email Sent from Your Domain

If you start getting bounce warnings or complaints about spam from your domain, your WordPress site may be compromised.

Why does this happen? One of the main uses of malware is sending spam email through your server. Attackers like using trusted domains to bypass spam filters. That not only wastes server resources but can also damage your domain’s email reputation permanently.

According to recent security data, more than 90,000 malware attacks happen every minute across the internet, and many of them aim to take over email servers.

What to do:

1. Check your email logs for suspicious activity
2. Use SPF, DKIM, and DMARC to protect your email domain
3. Contact your hosting provider, because they may have additional tools to detect and stop spam

6. Warnings from Google or the Browser

If Google Search Console sends a security alert, or if visitors begin seeing browser warnings when they open your site, that is a strong sign your website is infected.

Why does this happen? Google and popular browsers such as Chrome, Firefox, and Safari actively scan and flag infected websites to protect users. If your site gets flagged, traffic and trust can drop quickly.

What to do:

1. Check Google Search Console for the exact issue
2. Clean the infection using Google’s recommended steps
3. Once the site is clean, submit a reconsideration request

7. Unexplained File and Code Changes

If you notice code changes in WordPress files that you did not make yourself, that is a warning sign that your site may be infected.

Why does this happen? Attackers often modify core WordPress files, theme files, or plugin files to insert backdoors or other malicious code. This gives them ongoing access even after you change passwords.

What to do:

1. Compare your WordPress core files with the original version using wp core verify-checksum if you use WP-CLI
2. Check file modification dates to see which files changed recently
3. Reinstall the WordPress core to make sure all system files are clean
4. Review themes and plugins for injected code

Steps to Handle a WordPress Malware Infection

If you find one or more of the signs above and are sure your site is infected, take these steps:

1. Isolate the Website

The first step is to put the site into maintenance mode to prevent more damage and protect visitors from exposure.

2. Back Up the Website Carefully

Always back up before making major changes, but be careful not to overwrite a clean backup with an infected one. Ideally, you should have a backup from before the infection happened.

Learn how to back up your WordPress website properly in our article about why WordPress maintenance matters.

3. Scan the Site for Malware

Use a reliable malware scanning tool to identify infected files and code. Sucuri SiteCheck is a free online tool that can help detect problems on your website.

4. Clean the Infection

Once you identify the infected files, you need to clean them. That may involve:

• Removing unknown plugins and themes
• Replacing WordPress core files with a fresh copy
• Removing suspicious users
• Cleaning spam content from the database
• Removing malicious code from theme and plugin files

5. Improve Security to Prevent Future Infections

After the site is clean, strengthen its security:

• Update WordPress, plugins, and themes regularly
• Use strong and unique passwords
• Enable two-factor authentication
• Consider a web application firewall
• Limit failed login attempts
• Run security scans regularly

For more WordPress security guidance, read our article about how to keep a WordPress website safe.

6. Submit a Reconsideration Request to Google if Needed

If Google flagged your website, submit a reconsideration request after the issue has been cleaned up.

Dealing with Spam Pages Indexed by Google

If malware has been active for a long time, hackers may have created spam pages that are already indexed by Google. This is a serious issue that is often missed during cleanup.

How to Detect Indexed Spam Pages

1. Use the site: operator in Google by searching site:yourdomain.com to see all indexed pages
2. Look for URLs or titles you do not recognize, such as gambling, pharmacy, adult content, or suspicious links
3. Also check pages that should never be indexed, such as admin or configuration pages

How to Handle Indexed Spam Pages

1. Document All Suspicious Pages

   • Create a complete list of spam URLs you found
   • Note the discovery date and search result position

2. Remove Malicious Content from the Website

   • Delete all spam files and pages created by the attacker
   • Clean suspicious database entries
   • Make sure every malware account has been removed

3. Prioritize URL Removal in Google Search Console

   • Verify your site in Google Search Console
   • Use the “URL Removal” tool to request fast removal of malicious URLs from the index
   • This is usually the fastest and most effective way to remove harmful content from Google results
   • Open the “Removals” tab and click “New removal request”

   

4. Redirect Removed Pages

   • Use a 301 redirect to the homepage for spam URLs that may still get traffic:

     Redirect 301 /old-spam-page.html /

   • This helps visitors who click old spam results land on your homepage instead
   • It also helps Google understand that the page has moved permanently

5. Additional Methods if Needed

   • If a page cannot be removed directly, you can use HTTP 410 Gone:

     Redirect 410 /old-spam-page.html

   • For especially persistent cases, you can still use a noindex meta tag as a backup:

     <meta name="robots" content="noindex, nofollow">

6. Monitor Google Indexing Regularly

   • Check your site index status in Search Console from time to time
   • Use Google Alerts to detect if your domain appears with suspicious content
   • Consider SEO monitoring tools to track index changes

Remember that removal from Google can take anywhere from a few days to several weeks. Be patient and keep monitoring until the harmful pages are fully gone from search results.

Conclusion

Detecting malware early can save a lot of time, money, and stress. By knowing these hidden signs, you can act quickly to protect your website and visitors.

Unfortunately, WordPress malware attacks are becoming more advanced and harder to detect. That is why strong security practices and regular monitoring matter, even when everything looks fine.

If you are not sure whether your site is infected or you do not have the technical skills to clean it yourself, our WordPress malware removal service can help. We have years of experience handling different kinds of infections and can restore your website quickly and effectively.

When it comes to WordPress malware, prevention is always better than cure. Invest time and resources in securing your website now, and you will save yourself many problems later.