PDF malware analysis — malicious · ac9d7746b659be19

MALICIOUS

PDF

4.6 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: c2bc750a732ec425fb28d5dae44dc7f6 SHA-1: 6f9e11a44a12cbad04771f49b56fb1987dc02e7c SHA-256: ac9d7746b659be19600caaef4b89e933ddde07c47541668b30d9954190a88560

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains obfuscated JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics, and a high-confidence ML classification. The presence of an eval() call within the JavaScript stream suggests dynamic code execution, likely to download and run a second-stage payload. The ML_NYX_PDF_MALICIOUS score of 0.999991 strongly supports its malicious nature. No specific family could be identified due to the obfuscation.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `6b3c3c50e63e4f92c3909b23c0732f688d211c24d385ab21694ad8edd3341b1a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x364	6314 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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