Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d81cb28003fd4fc…

MALICIOUS

PDF

21.4 KB
MD5: 6098980b009d43c7879ac452bd9fd3a6 SHA-1: c6452e452e6daab9ee4a902a81f82d355eb367bf SHA-256: 3d81cb28003fd4fc6f66158467393b290e2b10b20a3c9552b199db828fed9077
78 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability (media.newPlayer) to execute arbitrary code. The heuristic firings indicate the presence of JavaScript actions and streams, and specifically call out the CVE-2009-4324 exploit. The deobfuscated JavaScript likely attempts to download and execute a second-stage payload.

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.
  • 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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0008_000.js
8b71cf60ca62bad69a522272fb32a13c26a17a3ad667d7b258a2d630445fe38f		 pdf-javascript-stream PDF /JS object 8 at offset 0x1E7 2205 bytes
legacy_pdfkit_stage_000.js
630bbd87d4c991442612bbfc5d0e64a58d98100212c3f8e897f80b45684ffd16		 deobfuscated-js repeated-marker hex decoded JavaScript at offset 0xAB8 1262 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
legacy_pdfkit_stage_001.js
42025b552c7960b53abcd8cd732b01c8d109eccfdfefc352b9826c4d5807d414		 deobfuscated-js cross-stage annotation API aliases at offset 0x1E7 81 bytes

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