Malicious PDF — malware analysis report

Static analysis result for SHA-256 92cf298689cdb634…

MALICIOUS

PDF

6.5 KB Created: 2009-08-22 12:04:55 Authoring application: EuMNfkXa (via BXYii)
MD5: 2e01c566e4d00a8559e6008a3bbfa023 SHA-1: f671a5819a8bd96df062e15374633ebbb4a127e6 SHA-256: 92cf298689cdb634718be67bf56b9f1e9562c52511ef922122c030215d87715c
280 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and is configured with an OpenAction trigger, indicating it's designed to execute code upon opening. Critical heuristics identified exploits for CVE-2007-5659 (Collab.collectEmailInfo) and CVE-2008-2992 (util.printf), which are commonly used to achieve arbitrary code execution in older PDF viewers. The presence of JavaScript and these specific exploit triggers strongly suggests the file's purpose is to download and execute a secondary malicious payload.

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)
  • 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)
  • ClamAV: Pdf.Dropper.Agent-7283378-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7283378-0
  • OpenAction trigger high PDF_OPENACTION
    PDF has an /OpenAction — code runs automatically when opened
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
c2806e4e360706c025ad6a3411d5f46eb45ffe9a08ce1891678fb90216d8c17c		 pdf-javascript-stream PDF /JS object 7 at offset 0x240 5316 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 5 eval/decoder/string-building token(s).

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