PDF malware analysis — malicious · ee6f6f5fa4bbc343

MALICIOUS

PDF

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

MD5: 75334bbc8588dec68c5f4fe6354559fb SHA-1: 86ab09434c901d487dd3e881c7d6bddb035e3739 SHA-256: ee6f6f5fa4bbc3437c6ea30a2d7ee9d05623b6d042888f6400ed3410e7faff3c

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript that utilizes eval() calls, a common technique for obfuscating malicious code. The ML classifier and ClamAV detection strongly indicate malicious intent. The script's heavy reliance on eval() and string concatenation suggests it's designed to download and execute a second-stage payload, though the exact nature of the payload is obscured. The presence of `Pdf.Exploit.Agent-36118` as a ClamAV signature further supports the malicious classification.

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` `fba7a903bf02ed2e04c0980e9b737d9f31d82c59b7200c4b5ce41345d50abc63`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13503 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 8 long base64-like blob(s).

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