PDF malware analysis — malicious · 56bbaeeb96c1e66c

MALICIOUS

PDF

21.4 KB

MD5: fb0a1b9b1129cc1ed13dd4e01fe7c9f4 SHA-1: 23606c834b57df7526e5e6615833d7c1634bb23a SHA-256: 56bbaeeb96c1e66c616c014896f55fecc34eb5aaffa5fc23499510e411bddbfd

108 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript, flagged by multiple heuristics. The critical CVE_2009_4324 heuristic specifically identifies the use of the media.newPlayer API, a known vulnerability trigger. The embedded JavaScript, particularly the deobfuscated legacy_pdfkit_stage_000.js, is designed to execute malicious code, likely for downloading and executing a secondary payload. The ML classifier strongly indicates maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `dfc9da012874958b4c442198ccbd656404a3ed3f6a74cc82eac63c40528f68ac`	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

Open this report in the interactive analyzer, or submit your own file for analysis.