Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ef23db1ceec37d1…

MALICIOUS

PDF

8.4 KB Created: ¬·¦»e’ÌPpÄ §2j‘ Authoring application: »îæâ7ߏIpÛ½0hi— (via »îæâ7ߏI±}³O/:×ô|a[oµ›‡õû/)
MD5: 9b4a3f0644a4e2ad9e5c929ae99f1bf2 SHA-1: 2d61f7c7a691d7ba0c2bdcf3fbf8e6b90791b29c SHA-256: 2ef23db1ceec37d1e115c6455a83f8d468cc8070ef936d3eeb95eef2e9a097f4
86 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript. The PDF is encrypted and uses an OpenAction to hide its payload, indicating an attempt to evade static analysis. The JavaScript action is likely responsible for decrypting and executing the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Encrypted PDF carries /OpenAction — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS
    PDF 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.
  • 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.

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