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Category: Malware

Type: Trojan-dropper

Aliases: Trojan-dropper:JS/PdfDropper.A


Trojan-dropper:JS/PdfDropper identifies specially-crafted PDF files that drop and execute a document file. The dropped document file in turn contains code that downloads and runs additional harmful programs.


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Technical Details

The PdfDropper file is usually distributed in spam email campaigns. Its appearance and content is usually designed to lure unsuspecting users into opening the file. The PDF file is specially crafted to contain and deliver a document file, which in turn has malicious macro code embedded in it.

Opening the PDF file causes JavaScript code included in it to run, which drops and opens the document file. This executes the embedded macro code, which contacts a remote server to download and run other harmful programs on the machine.

In previously analyzed samples, the downloaded programs include ransomware (Locky) and banking trojans (Dridex).

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