PDF malware analysis — malicious · cbd670bbac76e50a

MALICIOUS

PDF

4.4 KB Created: 2008-09-07 22:47:39 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 15e1cc15ab9c3b58822fea7f15a0db77 SHA-1: bb9a8b90b162b8493feed9c40978b038222dbdc4 SHA-256: cbd670bbac76e50adabbd91e2533044bd3389a138303e8abfe1fe68f23806755

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 highly malicious. The embedded JavaScript file, 'javascript_obj0013_001.js', is the primary artifact, and its obfuscated nature points towards malicious intent, likely to download and execute a secondary 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` `9b1e614167a3afb37be38a9c1db855b722089df748b353747dcb0187b3818f20`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37A	5864 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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