Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ac8f541b89cc3c…

MALICIOUS

PDF

603.2 KB Created: ”¶ïB¬½þIóH}´;"Â6ºöhl«Ón…·ÏÅ7ñi1ªG/ ؔ7ÖX>ÄT Authoring application: }ã^Ý¿g4l–QZ½‹ð[H?Ã0¢âµÎÄ­µÍëФtw×ûßèfôc!°–òž (via KÂíªè;ÎañÚÓ´†e%Ò¿†NiV§²nø÷–\ä4lbÜ\Ôè3*Ün)
MD5: 23ea9000ce56770b2e77505b70b71a10 SHA-1: 3a376d017689e8d772b41382bfab56e6de963f4c SHA-256: 53ac8f541b89cc3c3529b79d9c133363a82989776467f459f5c642a0d3d87fe3
216 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

This PDF document is malicious and exploits CVE-2011-2462, a vulnerability in the Adobe Reader U3D/RichMedia parser. The presence of JavaScript and RichMedia (Flash) content, along with a U3D reference, indicates an attempt to achieve code execution. The document body is unreadable, but the heuristics strongly suggest exploitation.

Heuristics 10

  • Adobe Reader U3D/RichMedia parser exploit critical CVE likely CVE_2011_2462
    PDF combines U3D 3D content with RichMedia/Flash activation and JavaScript/action surfaces. This is the U3D RichMedia exploit document shape associated with CVE-2011-2462.
  • 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.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 1 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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

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