PDF malware analysis — malicious · 59529fe4dbf5bb51

MALICIOUS

PDF

23.0 KB Created: 2011-72-51 03:25:00

MD5: ea173570470a67e7ed540ee4e501a335 SHA-1: 8f02e7a3fd96bb38f99380968810fe0e3f13b158 SHA-256: 59529fe4dbf5bb514b3cc812e208f1bab997f653d594215f944e0a21ef8c2498

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF contains embedded JavaScript, which is flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL due to an eval() call. The ML classifier strongly indicates maliciousness. The JavaScript stream, named javascript_obj0001_000.js, is likely responsible for executing the malicious payload. The exact functionality of the script is obscured, but its presence within a PDF and the eval() call suggest it's designed to exploit vulnerabilities or download further malicious content.

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_obj0001_000.js` `f0b650c23ab97c956a3535fb7043345306dbc87b646d269d00162f5361968ec4`	pdf-javascript-stream	PDF /JS object 1 at offset 0x586C	707 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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