MALICIOUS
86
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1566.001 Spearphishing Attachment
T1027 Obfuscated Files or Information
The PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The presence of PDF_ENCRYPTED_WITH_JS indicates that the JavaScript is used to hide the actual malicious payload, a common technique for exploit delivery or drive-by downloads. The obfuscated nature of the document body and the encrypted nature of the PDF prevent a more detailed analysis of the specific payload or delivery mechanism.
Machine Learning
- Nyx PDF Classifier malicious score 0.9456
Heuristics 3
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Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JSPDF declares /Encrypt and also references an executable trigger (/JavaScript). 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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