Perl

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.

Chilkat Perl Downloads

Download Chilkat for Perl

Chilkat2 Perl

use strict;
use warnings;
use Chilkat2;

# Demonstrates the UnSpamify method, which unobfuscates an email by undoing common spammer
# tricks: it removes comments from HTML bodies and unobfuscates hyperlinked URLs.

my $email = Chilkat2::Email->new;
$email->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();

my $cleaned = $email->GetHtmlBody();
print $cleaned, "\n";