PDF malware analysis — malicious · 3a85fea99bddf223

MALICIOUS

PDF

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

MD5: 33dccab000efd87818f24ad6916a951e SHA-1: 98c488af16693621117f537d7c1f407b3bf16d03 SHA-256: 3a85fea99bddf223c6af518d9beaf68dd7b1e21259dbcbe48d89b36c462de012

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file was flagged as malicious by an ML classifier and contains multiple JavaScript streams. The heuristics indicate the presence of JavaScript actions, embedded JS streams, and a high-confidence eval() call, suggesting code execution. The obfuscated JavaScript likely attempts to download and execute a second-stage payload. The document body itself does not contain user-readable content, but the embedded scripts are the primary indicators of malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `922a58850d7b07272bc5ed0052fbd62b8737e27c94ffe0f54277a94a5eda3428`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	9402 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).
`javascript_obj0013_001.js` `c091b16d619bb14c7cccdba99bd267a2d701a34b2f142d8b994d408fa7f90597`	pdf-javascript-stream	PDF /JS object 13 at offset 0x358	10108 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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