PDF malware analysis — malicious · 1f48b95047b821e6

MALICIOUS

PDF

9.4 KB Created: 2010-05-25 13:53:44 Authoring application: OwlAvz3 (via GOa0uvL88ZyRJ)

MD5: f31040ea577dec6771a8915aecd9a548 SHA-1: 5952f7c45a913f004e01285c5374e69cfc980509 SHA-256: 1f48b95047b821e6aaaaf129048d4e73bb2b2e3f39c957988749a540e5b8370f

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by heuristics as suspicious and containing an eval() call. The ML classifier strongly indicates maliciousness. The JavaScript stream, named 'javascript_obj0007_000.js', is obfuscated and likely responsible for downloading and executing a second-stage payload. The specific obfuscation and lack of clear indicators prevent definitive family attribution.

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` `96e51b0cde1cd9d3b496160d2144b06ddaeca8a0d2b835b2c0216856f06cbbef`	pdf-javascript-stream	PDF /JS object 7 at offset 0x237	8015 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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