How to Remove the Japanese SEO Spam Hack from WordPress in Malaysia

The Japanese SEO spam hack is one of the most common and damaging malware infections affecting Malaysian WordPress sites. It silently creates thousands of hidden pages with Japanese characters on your domain, hijacking your search rankings to sell counterfeit goods.

1. Identify the Scope in Google Search Console

Before deleting anything, you must understand the infection's scale. Open Google Search Console, navigate to Pages > Not Indexed (or Indexed), and look for URLs resembling /?p=123&lang=ja or /brand/fake-bags/.

2. Clean the .htaccess File

The malware often hijacks your Apache routing to serve spam pages to Googlebot while showing the normal site to humans. Connect via SSH and inspect the .htaccess:

cat .htaccess

If you see strange RewriteRule conditions checking for HTTP_USER_AGENT (like Googlebot), replace the file with the default WordPress routing rules.

3. Hunt for Rogue PHP Files

Hackers usually drop backdoors in wp-content/uploads/ or disguised as core files. Use SSH to find recently modified PHP files:

find . -type f -name "*.php" -mtime -14

Look for heavily obfuscated code using eval(base64_decode(...)). Delete these rogue files immediately.

4. Sitemap and Cache Cleanup

Once the malware is removed, you must rebuild your XML sitemaps to flush out the injected URLs. Delete your caching plugin's cache, regenerate the sitemaps, and resubmit them via Google Search Console. Use the "Removals" tool for the highest-ranking spam URLs.

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