Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d04b79b4e3a506…

MALICIOUS

PDF

12.1 KB Created: 2010-07-25 10:32:51
MD5: 4433c0b93e67aebca8377a8c6b56d973 SHA-1: 2342fb196ef146e8bcfbc02e3dee79e3699c0a9a SHA-256: 14d04b79b4e3a506da2123b2b0e472ce479705537eecae3e1b87b435470938b0
388 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript that exploits multiple Adobe Reader vulnerabilities including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript is designed to download and execute a second-stage payload, indicated by the deobfuscated script and the critical heuristic firings. The specific payload or its ultimate destination could not be determined from the provided evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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. (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)
  • Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH
    A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
  • PDF /Producer character-range JavaScript stager high PDF_INFO_PRODUCER_CHAR_RANGE_JS_STAGER
    PDF metadata hides JavaScript in /Producer as character ranges plus a long numeric index table. The document JavaScript rebuilds an alphabet from those ranges, maps the indexes into characters, and evals the recovered exploit stage. The decoder is bounded and only fires when the recovered stage contains exploit-like Acrobat JavaScript.
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
c62e81ebfdce55805c853c57b71fed8a812248d3ae20536e73dbdd06f86a8eaa		 pdf-javascript-stream PDF /JS object 7 at offset 0x2CE2 464 bytes
javascript_obj0007_001.js
a222f225459ad90d0e34efbaf540583500e97a9c3cb877bdf54747b3c4b00d8f		 pdf-javascript-stream PDF /JS object 7 at offset 0x2CE2 101 bytes
producer_char_range_stage_000.js
62a20334290244e109d8ee7ed8f37378a71733604030fe4438b6a19042066ee2		 deobfuscated-js PDF /Info Producer char-range indexed JavaScript at offset 0x19A 3667 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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