PDF malware analysis — malicious · c396d5922ad124b7

MALICIOUS

PDF

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

MD5: a6d8b72eebc85d1472620d2f9dd609d9 SHA-1: 585c678ca17c02ca4a34c6bea724fec71bcd0c09 SHA-256: c396d5922ad124b7239b30a6f46cbe7f170d8f54fa9d2356dcaac03d540b60e5

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call within the JavaScript stream (PDF_EVAL) strongly suggests code execution. The ML classifier also flagged this PDF as malicious with a high probability. The extracted artifact 'javascript_obj0013_001.js' is likely the source of the malicious JavaScript, which is designed to download and execute a second-stage payload.

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` `80cbde86db0d03882c42b93db56ed9bdf7cc641f9b04c7d58e0031e33be14304`	pdf-javascript-stream	PDF /JS object 13 at offset 0x36A	6586 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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