Java

Unobfuscate a Spammy Email

Demonstrates the Chilkat Email.UnSpamify method, which unobfuscates an email by undoing common spammer tricks — it removes comments from HTML bodies and unobfuscates hyperlinked URLs. This example cleans an HTML body whose link was broken up by an inserted comment.

Background: Spammers deliberately scramble HTML to slip past filters — inserting empty comments in the middle of words or URLs (example.com), or otherwise obfuscating links — so the message renders normally to a human but confuses naive keyword matching. UnSpamify reverses those tricks, producing a normalized body that is easier to analyze, classify, or scan for the real destination of its links.

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Java

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    //  Demonstrates the UnSpamify method, which unobfuscates an email by undoing common spammer
    //  tricks: it removes comments from HTML bodies and unobfuscates hyperlinked URLs.

    CkEmail email = new CkEmail();
    email.put_Subject("UnSpamify example");

    //  An HTML body with an obfuscating comment inserted into a hyperlink.
    email.SetHtmlBody("<html><body>Visit <a href=\"http://exa<!--x-->mple.com\">our site</a>.</body></html>");

    //  Undo the obfuscation.
    email.UnSpamify();

    String cleaned = email.getHtmlBody();
    System.out.println(cleaned);
  }
}