Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a47c839a9e5b804…

MALICIOUS

PDF

3.6 KB Created: ǬdŒ“Ë©ù`4ÓJ⋠Authoring application: Ðõ$ÕÁ†êø„a(ÔSà€ (via Ðõ$ÕÁ†ê™î&«³ÀƟìZÚÌP±oº,Æ)
MD5: 0b6680961300deac59801450f4e97be0 SHA-1: 0c9cac50e025c75a9aed60f8fdeb779cadc37742 SHA-256: 4a47c839a9e5b804f6f294d7055b1930a21fbd736e3877f51d0ff1009cfe4e29
86 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file is flagged as malicious by a machine learning classifier and contains embedded JavaScript. The presence of PDF_ENCRYPTED_WITH_JS indicates that the JavaScript is used to hide the malicious payload from static analysis. The JavaScript action and embedded JS stream suggest the document is designed to download and execute a secondary payload.

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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