PDF malware analysis — malicious · 30392e8b1853a65e

MALICIOUS

PDF

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

MD5: afae1acc881640b48e878e13aeadb793 SHA-1: 3179f2f46b117ba907716d653db40dbc7810beb8 SHA-256: 30392e8b1853a65e03755590b7deef48b0bfae6cf7932d4f199ab97eeed0c44f

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, which is further obfuscated using an eval() call. The ML classifier strongly indicates maliciousness. The JavaScript stream, named 'javascript_obj0001_000.js', is the primary indicator of malicious activity, likely responsible for downloading and executing a second-stage payload. The specific techniques used suggest code execution via embedded scripts within a PDF document.

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` `1dd5a09474d87a8022d9425f077a6d248bab71939b63d6a8b616a2b1c6065c00`	pdf-javascript-stream	PDF /JS object 1 at offset 0x6446	954 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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