Putting a stop to PDF spam

As I mentioned a little while ago spammers are now using PDF documents to spam users with fake stock alerts. While the spammers are now diversifying by enclosing a PDF file inside zip files and even hiding their adverts inside Excel files, we can still have considerable success filtering them out.

I’ve recently happened upon a plug-in for SpamAssassin and some third-party Phishing and Scam databases for ClamAV; combined, these cut out substantial amounts of spam including PDF, XLS, and other difficult to deal with variants.

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