MALICIOUS
86
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 JavaScript/JScript
T1566.002 Spearphishing Attachment
This PDF sample was flagged as malicious by an ML classifier with high confidence. It contains embedded JavaScript, which is further obfuscated by PDF encryption and an OpenAction. This suggests the JavaScript is intended to download and execute a secondary payload, a common technique for delivering malware. No specific family could be identified due to the obfuscation.
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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