PDF malware analysis — malicious · dfeb5d6349a66485

MALICIOUS

PDF

7.9 KB Created: 2009-03-17 05:28:23 Authoring application: Vhp18M8Qa0 (via ugM13zFyaPDfGU)

MD5: 21614a7795c00cdb7c8b1939c9c4961e SHA-1: 485189c182f0572ba83a0f50b50b5f209b3fc20e SHA-256: dfeb5d6349a664851decaed95a993ac0da837132f911d96ff805fcf2a13c2549

90 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL due to an eval() call. The ML classifier strongly indicates maliciousness. The embedded JavaScript, named 'javascript_obj0007_000.js', is likely responsible for the malicious behavior, potentially downloading and executing a second-stage payload, though its exact function is obscured by obfuscation.

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_obj0007_000.js` `19022985a4b397f614557e98aebda0ce98260976521c9b71b9991076da2ddeea`	pdf-javascript-stream	PDF /JS object 7 at offset 0x240	6557 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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