PDF malware analysis — malicious · ca5a5906d2f05807

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: f43c6783a90f01fe14deb9148b2a6a88 SHA-1: 3b6dd68ccca409a3050c53142e17460587016f0b SHA-256: ca5a5906d2f0580762fc4e051f0109895ebd5d76348e3c181dbbe47bea58ed24

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() calls, a common technique for obfuscation and executing malicious code. Heuristics indicate a high likelihood of exploit activity, and ClamAV specifically identifies it as 'Pdf.Exploit.Agent-36118'. The JavaScript appears to be designed to download and execute a secondary payload, as suggested by the ML classifier and the presence of JavaScript actions. The reconstructed string 'javascript_obj0013_000.js' is a key artifact.

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` `a9c2bcf03f4f69eef226f9d3853bcdb3ff04764bad466f93a18a21ea31790c17`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13517 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 15 long base64-like blob(s).

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