MALICIOUS
98
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1566.001 Spearphishing Attachment
T1027 Obfuscated Files or Information
This PDF sample was flagged as malicious by an ML classifier and exhibits high-risk heuristics. It contains an embedded JavaScript stream and is encrypted with an /OpenAction, indicating an attempt to hide malicious content and execute it upon opening. The document body is unreadable, suggesting it serves as a lure, and the presence of JavaScript points to an attempt to download and execute a secondary payload.
Machine Learning
- Nyx PDF Classifier malicious score 0.7362
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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PDF paints image(s) but contains no text operators medium PDF_IMAGE_ONLY_LUREPDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
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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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