PDF / .TXT malware analysis — malicious · a734934b8572a227

MALICIOUS

PDF / .TXT

9.2 KB Created: 2010-05-11 08:19:50 Authoring application: mVusaT (via z8Sag)

MD5: ea2fe94c4270eda5449f8c13c77f2912 SHA-1: 4a68fafb622b823d037a364cb818549cf8925bf0 SHA-256: a734934b8572a227e34a63210815fc75724bce61f154375a1d0121a7a1b07462

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript with an eval() call, strongly indicating malicious intent. The ML classifier also flagged this as highly suspicious. The JavaScript is obfuscated, but the presence of eval() suggests it's designed to download and execute a second-stage payload. The file's metadata indicates it was authored by 'mVusaT', which may be a tool or packer.

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` `a3edfeace043042894f459f47beaf3e780fa4b3b983627dca91e690b213b4712`	pdf-javascript-stream	PDF /JS object 7 at offset 0x246	8086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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