PDF malware analysis — malicious · f88692fe29aedefd

MALICIOUS

PDF

6.7 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: ddd188df2652af0e275a61fa1ed25a6f SHA-1: e223403353f48692bdf3ec1dc1383c3f88f4b397 SHA-256: f88692fe29aedefdc2c640eaa84aed0227f7df6ea759f5de9f84a80847678b2b

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, PDF_EVAL, indicates the use of eval() for code execution. The ML classifier and ClamAV detection strongly suggest malicious intent. The JavaScript appears to be obfuscated, with string concatenation used to build parts of the code, making direct reconstruction of the final payload URL or command difficult. The primary function of the script is to execute obfuscated code, likely to download and run a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35587
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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` `bb12d0be510797c66d29e101b17d22d55d8fbfad01888ef6c9bf190d1705c4e5`	pdf-javascript-stream	PDF /JS object 13 at offset 0x392	5342 bytes
Detection ClamAV: Pdf.Exploit.Agent-35587 Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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