Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da9d4707e440696…

MALICIOUS

PDF

7.2 KB
MD5: 7b893e3de59d07acce6611045daf8290 SHA-1: c33c77ba6f0fcabf760bb0027917e9390377e7cf SHA-256: 0da9d4707e44069604899dd55cce2e4a6e4fa0215dbfe58554f771a3a86baaef
110 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2009-4324, indicating exploitation of a known vulnerability. The embedded JavaScript is likely intended to download and execute a second-stage payload, although the specific content could not be fully analyzed due to obfuscation. The benign URLs present do not detract from the malicious nature indicated by the exploit and script.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9802

Heuristics 5

  • 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)
  • 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_off00000345.js
84bbebd5399b31b3bc4e8e5276b2bd6a54b230bf68004d90c6407b932cb8e454		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x345 1265 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
objstm_0026_00.bin
8dc9b6261250547e07d5d467531e5e66c6598481122906db67cb99ca8ce31b31		 pdf-objstm-decoded PDF /ObjStm 26 0 obj (inflated) 648 bytes

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