Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5c0563d7a28d343…

MALICIOUS

PDF

9.9 KB Created: 2010-06-06 12:38:58 Authoring application: Pwezicohibemadafi (via 531f4Swasezoka)
MD5: 51c24c671ec125574a9b234ed574fda4 SHA-1: 11f69ec48545cb99fbed10a07f5b8c7084b3f677 SHA-256: f5c0563d7a28d3439af63619d4b92be950d8145ee9fb37d5eb98bcf01c3a8db5
298 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link or Trusted Domain T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings indicating the exploitation of several CVEs (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) through XOR-decoded JavaScript. This JavaScript is embedded within the document and triggered by an OpenAction. The primary intent appears to be the execution of this script, which is designed to download and execute a second-stage payload. The obfuscated nature of the script and the use of multiple exploits suggest a sophisticated attack.

Heuristics 8

  • 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. (identified after JavaScript deobfuscation)
  • Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927
    PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
  • 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. (identified after JavaScript deobfuscation)
  • 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. (identified after JavaScript deobfuscation)
  • OpenAction trigger high PDF_OPENACTION
    PDF has an /OpenAction — code runs automatically when opened
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0017_000.js
dfaf0df11780b2f40266faa477fe5440b90e0d3d484dce0dd1abec0223b6c294		 pdf-javascript-stream PDF /JS object 17 at offset 0x19D2 4002 bytes
page_word_xor_stage_000.js
11237b14b2d926c1daa1be5764d141d4c89c61662ae20b931152c525001fe2dd		 deobfuscated-js page-word XOR decoded JavaScript (decompressed, key=0xEE) at offset 0x7D1 3028 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 4 eval/decoder/string-building token(s).

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