Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f683c2247b42311…

MALICIOUS

PDF

7.0 KB
MD5: cda7baafa0975dc1103117aea148e41e SHA-1: c19546ce873ff3e786f130b2bd5a5a833ecc9bc3 SHA-256: 7f683c2247b423112e4e2826d82ef482631950169993a1d4806b7c8108fa6b59
118 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that is obfuscated using unescape(). The critical heuristic firing for CVE-2009-4324 indicates the exploitation of a vulnerability related to media player functionality. The JavaScript is likely used to download and execute a second-stage payload, leveraging the identified CVE. No specific malware family could be confidently identified.

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. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • 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/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00000327.js
8b50be2df1eb8d362314afb2b0be0b867953986946aff5a5688379a175744075		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327 1231 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).
objstm_0024_00.bin
e42c11b8766a56b1c753449708545f25e0944d57ba09ee3ef70126b08e900ba9		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 648 bytes

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