Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9504e37c71cbc15…

MALICIOUS

PDF

1.15 MB Created: @\CñæñæcN°§êÒ"©t×´žÖ oŠ–”h,kS¶V4€7XZ Authoring application: @\Cñæñæ^ïˆ¢o¡òÇ*YÆ*»`3>+¿ ¿sb'ì (via @\CñæñæÝu ©ËpøØBù?G¶kAQS~@ºØ©¥ƒø)GjÛèËÕ(2>ÅÌNDeô8)
MD5: 064a6ce37055a90f7a98bbf3899ebd38 SHA-1: 227461ee27b777c70b138d0dd6b3e89bd40f7fe1 SHA-256: b9504e37c71cbc1544bcdb2700608dc7f3630c48b7c99861402c3df7abf1f28e
168 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and a launch action, indicating an attempt to execute code. The presence of U3D content and encryption with JavaScript suggests a sophisticated exploit targeting PDF reader vulnerabilities. While the document body is unreadable, the heuristics strongly suggest the PDF is designed to download and execute a secondary payload, likely leveraging CVE-related exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8347

Heuristics 7

  • U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED
    PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
  • Launch action high PDF_LAUNCH
    PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
  • 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.
  • 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.
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/

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