PDF malware analysis — malicious · 46da5aa6ea7b5e64

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: f15c835a1696e31c3a880975cba133f1 SHA-1: db6a3d287d4e9f26f6fdf65d9f0fb2e4c30e806d SHA-256: 46da5aa6ea7b5e643d4d474df32c7302409f9062304e0edf7ee8fae75da19d9a

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript with multiple eval() calls, indicating an attempt to obfuscate malicious code. The ML classifier and ClamAV detection strongly suggest this is a malicious PDF exploiting a known vulnerability. The JavaScript appears to be designed to download and execute a second-stage payload, as evidenced by the eval() calls and the ML_NYX_PDF_MALICIOUS heuristic.

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` `a9637069dbd21cc5627a00512a9ae912e7cde3edc70449a5917be5d18ec6efef`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13519 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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