MALICIOUS
206
Risk Score
Malware Insights
MITRE ATT&CK
T1059.007 JavaScript
T1203 Exploitation for Client Execution
The PDF file contains embedded JavaScript that utilizes eval() to decode and execute a malicious payload. This is strongly indicated by the PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL heuristic firings, as well as the ML_NYX_PDF_MALICIOUS classification and ClamAV detection. The JavaScript appears to be designed to exploit a known vulnerability within PDF viewers to achieve arbitrary code execution.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 5
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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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ClamAV: Pdf.Exploit.Agent-21812 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-21812
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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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