PDF malware analysis — malicious · fd0cfafd8baf2487

MALICIOUS

PDF

30.9 KB

MD5: 29160dcf797e68d291f5ffd4aaad11cf SHA-1: d7f29a97a4e0606f8958784e591598bccb9a49f7 SHA-256: fd0cfafd8baf2487cdeac3d14da95b8b85e19d60911f84c78918bdf14c7ea6a4

76 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File

The PDF contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly suggests maliciousness. The embedded file 'dew006.docx' is also suspicious. The JavaScript streams, though small, are likely responsible for exploiting a PDF vulnerability to execute code, potentially leading to the download of further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`dew006.docx` `f675ccacf5599eb88d18a09b49d06cd4658e7ce1e20a33379c2afc2e631bc1f6`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x388	10109 bytes
`javascript_obj0009_000.js` `b605b2fa8e7edbde866d8208240c2ce15e15d3ce25950041dbdb3f4b41623488`	pdf-javascript-stream	PDF /JS object 9 at offset 0x7A26	60 bytes
`javascript_obj0009_001.js` `398bcb05cb110bde1cc663048227b5ed87b095a9328585c3a8c63370ee8e4ab8`	pdf-javascript-stream	PDF /JS object 9 at offset 0x7A26	58 bytes

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