MALICIOUS
86
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 JavaScript/JScript
T1553.004 Subversion: Privileged File
This PDF was flagged as malicious by an ML classifier with high confidence. It contains embedded JavaScript, which is used to encrypt the document's content and hide an OpenAction, preventing static analysis of the payload. The presence of JavaScript and encryption suggests the document is designed to evade detection and deliver a malicious payload upon opening.
Machine Learning
- Nyx PDF Classifier malicious score 1.0000
Heuristics 3
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Encrypted PDF carries /OpenAction — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JSPDF declares /Encrypt and also references an executable trigger (/OpenAction). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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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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