Malicious PDF — malware analysis report

Static analysis result for SHA-256 9436b76b0a689b6a…

MALICIOUS

PDF

8.9 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)
MD5: 75be3472fd3fe8f93d5947637057785e SHA-1: 5fa966db41d98c1fcf4ad4aaca1bee17e881fdbe SHA-256: 9436b76b0a689b6a94e7ace1d10aee66acbd8fa6d1f598295815556109d2075b
376 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and triggers an OpenAction, indicating an attempt to automatically execute code upon opening. Critical heuristics identify exploitation of CVE-2009-4324 (media.newPlayer), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf), all common methods for exploiting Adobe Reader vulnerabilities. The ClamAV detection as 'Pdf.Dropper.Agent-7283827-0' further confirms its malicious nature. The embedded JavaScript, though obfuscated, likely facilitates the download and execution of a secondary payload.

Heuristics 9

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009.
  • 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.
  • 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.
  • ClamAV: Pdf.Dropper.Agent-7283827-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7283827-0
  • 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
  • Suspicious extracted artifact high 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.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0013_001.js
eb9a49ab361b22b41c93f76dd7a7a1080f8850b13b157785b3b49b3cee78386c		 pdf-javascript-stream PDF /JS object 13 at offset 0x390 7602 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 7 eval/decoder/string-building token(s).

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