MALICIOUS
88
Risk Score
Malware Insights
MITRE ATT&CK
T1059.001 PowerShell
T1566.002 Spearphishing Attachment
This PDF sample was flagged as malicious by an ML classifier. It contains embedded JavaScript that is used to encrypt the PDF content, hiding the payload from static analysis. The presence of JavaScript actions and encrypted content strongly suggests the document is designed to download and execute a secondary malicious payload upon opening.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 4
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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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PDF paints image(s) but contains no text operators info 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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