PDF malware analysis — malicious · aca04a7200412606

MALICIOUS

PDF

9.3 KB Created: 2010-06-14 13:30:44 Authoring application: gYSKyRBX2 (via vx8E0)

MD5: ef0b834a185c0c126b8329ef91f78b6d SHA-1: 543a04c7535579c0680852ca65b4f320a73afab4 SHA-256: aca04a72004126064e3c8c4e031ccc448988ccd23e2a5803ed759add9962cdaa

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, flagged by multiple heuristics including a high-severity eval() call. The ML classifier strongly indicates maliciousness. The JavaScript is obfuscated and likely intended to download and execute a second-stage payload. The specific obfuscation techniques and lack of clear indicators prevent confident 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` `a9a4a56a3c04713b7de728dbc96007b3315baefc2329f0b1d35c673e07192aaf`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23D	8001 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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