Malicious PDF — malware analysis report

Static analysis result for SHA-256 26ad2c7bc53a190a…

MALICIOUS

PDF

6.6 KB Created: 2008-03-04 12:10:33 -08:00
MD5: c289bc26462ef94f991d59c3708e3ba6 SHA-1: d09c50533b72c15e010f9bd4a13afc542994271b SHA-256: 26ad2c7bc53a190a85de7e9245b7798d5345abbffd2209022068287aa00ad56f
238 Risk Score

Malware Insights

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659 (Collab.collectEmailInfo). This indicates the file is designed to exploit a vulnerability in Adobe Reader to execute arbitrary code. The embedded JavaScript stream, identified as 'javascript_obj0004_000.js', likely contains the exploit code. ClamAV detections further confirm its malicious nature.

Heuristics 8

  • Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659
    PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
  • ClamAV: Pdf.Exploit.Agent-34571 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-34571
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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.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/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0004_000.js
16c3010510449d4f8441ee68af25c02f2db09b484f77b2208eded1990e1fe21b		 pdf-javascript-stream PDF /JS object 4 at offset 0x498 4981 bytes
Detection
ClamAV: Pdf.Exploit.Agent-34407
Obfuscation or payload: likely
Carved artifact contains 20 eval/decoder/string-building token(s).

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