PDF malware analysis — malicious · 045b9e35c060bb27

MALICIOUS

PDF

9.3 KB Created: 2010-06-07 15:19:37 Authoring application: rpi9V40Vy (via UNTlytiU2)

MD5: 35a2f8bfb3d6691ad76ec9d723ab2399 SHA-1: 2d584e4df3c38da629818c3495c5f1b6f26ba97b SHA-256: 045b9e35c060bb27f32dad5593d46c118b29b4883d8fcf9f9630e96af1e183f7

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript that is heavily obfuscated and utilizes eval() calls, strongly indicating malicious intent. The ML classifier also flagged this PDF as malicious with high confidence. The script's purpose is likely to download and execute a secondary payload, as suggested by the exploit cluster heuristic.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
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` `5b3d985454f113052a924e1e19fe20cffccda1a5d75f139b10686cdee8f82f51`	pdf-javascript-stream	PDF /JS object 7 at offset 0x246	8137 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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