PDF malware analysis — malicious · 9df5a4da976b6736

MALICIOUS

PDF

20.09 MB

MD5: 01eab86b29b5b4ce10de2fc9551bc95a SHA-1: 38629544c330b905e80dc1c547f95ad84f8538e2 SHA-256: 9df5a4da976b6736a386dda71882f4f89362d5d246de255bf97950319af003aa

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.002 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF was flagged as malicious by an ML classifier and exhibits several high-severity heuristics indicating the presence of hidden JavaScript. The PDF_ENCRYPTED_WITH_JS heuristic specifically points to the payload being concealed via JavaScript, likely to bypass static analysis. The document body is unreadable, suggesting it's a lure, and the embedded JavaScript is the primary mechanism for delivering the malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9924

Heuristics 6

Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS

PDF 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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Additional-actions dictionary low PDF_AA

PDF defines /AA (Additional Actions) that references an executable action (JS/JavaScript/Launch/SubmitForm) — can auto-trigger on document or widget events. Form-field calc/format/validate/keystroke handlers in legitimate interactive forms commonly fire this, so it is reported as a low-weight signal; weaponised auto-execution is flagged by stronger rules (PDF_OPENACTION, encrypted-with-JS, etc.)
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF 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.

Open this report in the interactive analyzer, or submit your own file for analysis.