Malicious PDF — malware analysis report

Static analysis result for SHA-256 b059817bcdd3631f…

MALICIOUS

PDF

741.7 KB Created: ”¶ïB¬½þIóH}´;ÒϪ6¿7ðJ×£Ùï³rmË+gÅq#uü1)Җ Authoring application: }ã^Ý¿g4l–QZ½‹ð)+-Ùú„˜Ï ~1»”z°“gZbM!q¹HýRÙ•nx (via KÂíªè;ÎañÚÓ´†eÙÇ&öT¨ŸPð'ˆy%ž#"½²Uå«y,Ýw8)
MD5: b848b312b3edf39f9ef445dbc6996a19 SHA-1: 654057ea8e467927566c4ca3975c71575906377e SHA-256: b059817bcdd3631fa3751f31169d267fb3e39a2c9287c8f9edc2bad00096e37e
276 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV (Pdf.Dropper.Agent-1506706). High-severity heuristics indicate the exploitation of CVE-2011-2462, targeting Adobe Reader's U3D and RichMedia parsers. The presence of embedded JavaScript and encrypted content suggests the file is designed to hide and deliver a secondary payload, likely exploiting these known vulnerabilities.

Heuristics 11

  • 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.
  • ClamAV: Pdf.Dropper.Agent-1506706 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1506706
  • 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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