MALICIOUS
206
Risk Score
Malware Insights
MITRE ATT&CK
T1203 Exploitation for Client Execution
T1059.007 JavaScript
The sample is a PDF file flagged by multiple heuristics and ClamAV as a known exploit. It contains embedded JavaScript with an eval() call, indicating an attempt to execute arbitrary code. The JavaScript is obfuscated, but the presence of eval() and the exploit cluster firing strongly suggest it's designed to trigger a vulnerability within the PDF reader.
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-35931 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Exploit.Agent-35931
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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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