PDF malware analysis — malicious · 288f9f93ed2da1b4

MALICIOUS

PDF

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

MD5: 253dc5d0058aeac129b1b4ab9182415b SHA-1: ff0680a2a98a65f7a38a905fd336bb56b0fd3f43 SHA-256: 288f9f93ed2da1b4585ed95b5b20c6006f7c267ac91cb5d010bc8e373229ba65

90 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 ML classifier strongly flags this PDF as malicious. A high-confidence heuristic for PDF_EVAL indicates the use of eval(), a common technique for obfuscating malicious JavaScript. The script's intent is to execute arbitrary code, likely to download and run a second-stage payload. The obfuscation and use of eval() suggest a deliberate attempt to evade detection.

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` `a9b638693b955d410c4a0c0857ce3ad9b13831ace2a00cf499bd1b4a37dc35ed`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6301 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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