PDF malware analysis — malicious · 4ee6320a8c597695

MALICIOUS

PDF

3.1 KB Created: 2008-08-03 07:51:49 -09:03 Authoring application: Adobe InDesign CS3 (5.0) (via Adobe PDF Library 8.1)

MD5: d0fcab48211e877a1ace5ee318f480a3 SHA-1: 1463d473328623dfcb58fce3ee14f30233681c5b SHA-256: 4ee6320a8c597695b2d80874ed67430a35ca9092cdd42b25496da9d6c81fd641

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ML classifier strongly suggests maliciousness. The presence of 'unescape()' and a suspicious JavaScript file named 'javascript_obj0013_001.js' points towards obfuscated code likely designed to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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` `4a2bfb0d556dbc68c42eaaa1297c27466211115878b19f072b8bf863d68f3273`	pdf-javascript-stream	PDF /JS object 13 at offset 0x380	2667 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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