Malicious PDF — malware analysis report

Static analysis result for SHA-256 5618db23fcee7a98…

MALICIOUS

PDF

10.0 KB Created: 2011-12-27 08:01:39 +08:00
MD5: 78efde89790c7742b1b01a49c5439535 SHA-1: 1e9848ad3ec7011b10b49b0184f11424201425db SHA-256: 5618db23fcee7a9856423b21738d25a058767ed1a1e168fc0998ed0a34a2f147
114 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a U3D stream, with high-severity heuristics indicating a potential vulnerability exploit related to Adobe Reader's 3D parsing (CVE-family). The embedded JavaScript, named 'javascript_obj0020_000.js', is likely responsible for executing the malicious payload. The presence of these elements strongly suggests an attack pattern aimed at exploiting a known vulnerability to achieve code execution.

Heuristics 8

  • 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.
  • unescape() call high PDF_UNESCAPE
    unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0010.bin
66b0047fec10f986beea02b2816546d1be047d13d430fe5158ce5a8eeda89001		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x514 771 bytes
javascript_obj0020_000.js
5c8177347663cb7df4d290e617c74407b9566aa514585f16b1c02dd00dd3acc3		 pdf-javascript-stream PDF /JS object 20 at offset 0x1ABB 7452 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
u3d_00_off00000211.bin
db47f9e6c2fa22cca9aaaaba842bc1035f54c0acd3737dbd64b69dc1671da5eb		 pdf-3d-stream PDF U3D 3D stream at offset 0x211 1268 bytes

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