PDF malware analysis — malicious · 325b818484036ff5

MALICIOUS

PDF

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

MD5: b61a6940f2caeecfd550610d51fc9743 SHA-1: 6e3a33a96782279ca3b7f6f0bf6965f6e6f9805a SHA-256: 325b818484036ff5c76aa59f62c18d5d7570fb4a3ccdbe73795e59e6db3ac2f3

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript with multiple eval() calls, indicating an attempt to obfuscate malicious code execution. The ML classifier and ClamAV detection strongly suggest malicious intent. The JavaScript likely downloads and executes a second-stage payload, as is common with this type of exploit.

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` `c4c6df43d0ed53c5ca00b565ca13f5ed3d2a7dd0d56f0b390e9474b57c996347`	pdf-javascript-stream	PDF /JS object 13 at offset 0x38D	5072 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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