MalDoc in PDF - Detection bypass by embedding a malicious Word file into a PDF file – - JPCERT/CC Eyes | JPCERT Coordination Center official Blog
https://blogs.jpcert.or.jp/en/2023/08/maldocinpdf.html
> JPCERT/CC has confirmed that a new technique was used in an attack that occurred in July, which bypasses detection by embedding a malicious Word file into a PDF file. This blog article calls the technique “MalDoc in PDF” hereafter and explains the details of and countermeasures against it.