PDF malware analysis — malicious · 0888f7ecdf31a652

MALICIOUS

PDF

22.2 KB Created: 2009-04-24 09:54:29 +02:00 Authoring application: PScript5.dll Version 5.2.2 (via Acrobat Distiller 7.0.5 (Windows))

MD5: 5a0fcacda89d41361908ad463da92834 SHA-1: 4b648e419b9fa47c7183f46f3d940e7a48529075 SHA-256: 0888f7ecdf31a65292a3c57c89ced9314b661724cecb3730ac34a20a43a155d4

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript that utilizes an eval() function, a common technique for executing obfuscated or dynamically generated code. The critical heuristic 'PDF JavaScript exploit cluster' strongly suggests this script is designed to exploit a vulnerability within the PDF reader to achieve code execution. The script's primary function appears to be downloading and executing a second-stage payload, though the exact URL or payload is heavily obfuscated within the JavaScript.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.

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