Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e52b8d15f01d4c4…

MALICIOUS

PDF

6.0 KB Created: 2010-02-25 09:19:16 +03:00
MD5: eb6c5a4472136632fe1129af10fba4ff SHA-1: 1b278183805a7eaf075741e690250e618169de79 SHA-256: 8e52b8d15f01d4c48fd63468d997f3aee527dd0e23c8a7c38c5cb5cbee66cc09
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. A critical heuristic identified CVE-2009-4324 via the media.newPlayer object, suggesting exploitation of a known vulnerability. The unescape() call and the decompressed JavaScript stream (stream_001_off00000200.js) further confirm the presence of obfuscated malicious code. This code likely attempts to download and execute a second-stage payload, a common technique for exploiting PDF vulnerabilities.

Heuristics 6

  • 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. (matched in decompressed stream)
  • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj111712_000.js
f7e448121ca51ff808c1c2cd0fe2c878c9868727fe39dde228b6eb7439c0ef35		 pdf-javascript-stream PDF /JS object 111712 at offset 0x4F2 258 bytes
stream_001_off00000200.js
4d1fd48320170f6ce2926fbb90ae92ac8b0795852562f539c490ad26fca9568d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x200 1270 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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