Malicious PDF — malware analysis report

Static analysis result for SHA-256 38d158e928a65be1…

MALICIOUS

PDF

55.7 KB Created: 2009-07-08 10:53:46 +08:00 Authoring application: Acrobat Distiller 7.0 (Windows)
MD5: 266c5653f92d70290ca1613b64b5f64c SHA-1: 288556d2bb734bfab086b9cc3da39f6bc49d18db SHA-256: 38d158e928a65be1cf8d30924da9cd412248945423e59e3e30f8d01096f9ef55
76 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, which is triggered by the CVE-2009-4324 vulnerability related to media.newPlayer. The JavaScript is obfuscated but appears to be designed to download and execute a second-stage payload. The presence of this exploit and obfuscated script indicates a malicious intent to compromise the user's system.

Heuristics 4

  • 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)
  • 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.
  • 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/pdf/1.3/
    • 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/pdfx/1.3/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0017_000.js
e4376e922fdb4b5778d4d32a284432b59e6d2169f5c1bf079b4732b218a27501		 pdf-javascript-stream PDF /JS object 17 at offset 0x4DA 3050 bytes
js_property_alias_stage_000.js
e7747bd94669494a3c86a0e1b7efa59b05654c77614bbfa508aae1a73dac11c9		 deobfuscated-js JavaScript hex-escape property alias normalized stage at offset 0x4DA 2840 bytes

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