MALICIOUS
146
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
This PDF contains embedded JavaScript that utilizes eval() to execute obfuscated code. The JavaScript is designed to exploit a vulnerability within the PDF viewer, leading to the execution of a secondary payload. The presence of PDF_JS_EXPLOIT_CLUSTER and PDF_EVAL heuristics strongly indicates this malicious behavior.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 4
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PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTERPDF 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.
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eval() call high PDF_EVALeval() found — commonly used for obfuscated exploit execution
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JavaScript action low PDF_JAVASCRIPTPDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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