PDF malware analysis — malicious · b97833d9341b3fc3

MALICIOUS

PDF

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

MD5: ef2a301e477af5fa011ca1876746238f SHA-1: e4a6880cbc11cc7d4e77428639f0064fc6da0fc3 SHA-256: b97833d9341b3fc3a9500792fa14f3ccea15b177fd390a3381699385550d61d6

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file contains obfuscated JavaScript that utilizes `eval()` to execute further code. The script appears to be constructing a string dynamically, likely to download and execute a second-stage payload. The ML classifier and ClamAV detection strongly indicate malicious intent, and the presence of JavaScript actions and embedded JS streams confirms the exploitation vector.

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` `7faa076241a163c09ccf6e9b10df3b92fa699dd20806cfa1824263608360c6cc`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13269 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 25 long base64-like blob(s).

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