Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ca288debe5daa9…

MALICIOUS

PDF

12.5 KB Created: 2008-11-04 22:02:12 -05:00 Authoring application: Acrobat Editor 8.0 (via Adobe Acrobat 8.1.2)
MD5: 28d40241feebcf627f52475e86a39a60 SHA-1: cf6932637b68a96522ce0fa3d18477d28e017a12 SHA-256: c2ca288debe5daa95203f6af5d7f9a8cf6843d6d4c172857682f8b98eecc7099
120 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: PowerShell

The PDF document contains embedded JavaScript and triggers a critical heuristic for CVE-2008-2992, indicating an exploit attempt. The document body explicitly mentions a Proof of Concept for APSB08-19 and references a CORE Security advisory concerning an Adobe Reader buffer overflow, suggesting the intent is to exploit this vulnerability to execute arbitrary code when the document is closed. No specific malware family is identifiable from the provided evidence.

Heuristics 6

  • util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992
    PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
  • 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.
  • 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.coresecurity
    • 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/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0010_000.js
6473b3130bb350fbc467c9145b6180de27f22fa3249122587fc03167f54dc922		 pdf-javascript-stream PDF /JS object 10 at offset 0x25E5 6416 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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