PDF malware analysis — malicious · c0f2e9fe360c7ee8

MALICIOUS

PDF

14.4 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 9899686e6626dae7cedb5e4090217295 SHA-1: 51bffa15371e5b834e618f7fa9b0a3cb319c5984 SHA-256: c0f2e9fe360c7ee8f3802d4fe8aa3b8e2bb06c15675fcbf252fbcc6bc9fe6740

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript with multiple obfuscation layers, including string concatenation and eval calls. Heuristics indicate PDF JavaScript actions, embedded JS streams, and eval() calls, strongly suggesting malicious script execution. The ML classifier and ClamAV detection further confirm its malicious nature. The script's primary function appears to be downloading and executing a second-stage payload, as indicated by the use of eval() on concatenated strings that likely form a URL or command.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
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_000.js` `b6ad995de0f68a62aee460dc6c6cc1d76d74f07832518d9ad5474ec64b4737e7`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13168 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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