PDF malware analysis — malicious · 3a80b32845d5143e

MALICIOUS

PDF

4.7 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 062fdf6edb1e3defe3e21522737d7fe9 SHA-1: faa32ae6b54d588912caa62920f3db142df92ec9 SHA-256: 3a80b32845d5143e10196ccbe193048279ff1d265abba95555d30ae68b4a98f2

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a high-severity PDF_EVAL rule firing suggests the JavaScript is obfuscated and likely uses eval() to execute arbitrary code. The ML classifier also strongly flags this PDF as malicious. The extracted JavaScript, javascript_obj0013_001.js, is too obfuscated to determine its exact payload, but the eval() call is a strong indicator of malicious intent, likely to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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` `efa980c83746500607b18e096ace1230442336648ebff9c0320e910aeb9c5e2a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x364	6462 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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