PDF malware analysis — malicious · 805c68cb50f170fb

MALICIOUS

PDF

8.0 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: e1058feaa4ad42d971de56b94e931f08 SHA-1: 3c891e190ce18c81db56fb60343555e384eb3907 SHA-256: 805c68cb50f170fb154b8c820b2385611df6fc793269c4a1bd63db6338411d85

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes eval() and obfuscated code, strongly indicating an exploit attempt. The ML classifier also flagged this PDF as malicious. The script's primary function appears to be downloading and executing a second-stage payload, though the exact URL is heavily obfuscated and truncated in the provided evidence.

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
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_obj0013_000.js` `4552f2e9f1c267e2872d242ceaadf7aca18de9617fb0fcb285aa9733754336f3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	6649 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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