The Hacker News - Beware of MalDoc in PDF: A New Polyglot Attack Allowing Attackers to Evade Antivirus

Cybersecurity researchers have called attention to a new antivirus evasion technique that involves embedding a malicious Microsoft Word file into a PDF file. The sneaky method, dubbed MalDoc in PDF by JPCERT/CC, is said to have been employed in an in-the-wild attack in July 2023. "A file created with MalDoc in PDF can be opened in Word even though it has magic numbers and file structure of PDF,"

from The Hacker News https://thehackernews.com/2023/09/beware-of-maldoc-in-pdf-new-polyglot.html

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