Malicious PDF — malware analysis report

Static analysis result for SHA-256 3140d3ae717606d9…

MALICIOUS

PDF

6.0 KB Created: 2010-02-19 14:38:11 +03:00
MD5: 923b1be66f7db85d0c41d1cb539baaff SHA-1: eed3975330f06a396d7b6e41070e8a9009fc4b94 SHA-256: 3140d3ae717606d92254dcb3ea8abd1dd9ad94cd855a130726a1db2ef1cada8f
118 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic firing suggests exploitation of a known vulnerability in Adobe Reader via the media.newPlayer object. The unescape() call further points to obfuscated JavaScript execution. The embedded JavaScript is likely designed to download and execute a second-stage payload, as suggested by the suspicious extracted artifact. No URLs were found to be malicious.

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_obj111111_000.js
2ec49d0e8fa30bfbc5ffa7ce593e131737f263af988b8111dda2846caa68d892		 pdf-javascript-stream PDF /JS object 111111 at offset 0x1C9 1205 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
javascript_obj111112_001.js
b4554f899ea59fe8cc92e7567a18f48d1d336c192f6c4108c8e86fe3948a3247		 pdf-javascript-stream PDF /JS object 111112 at offset 0x4D5 253 bytes

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