PDF malware analysis — malicious · 9f23207e249e55d3

MALICIOUS

PDF

21.5 KB

MD5: eeae791aab82e23929522f677dee0dcf SHA-1: 46667fae2e23b968cac41f22ea43807e285ed6f8 SHA-256: 9f23207e249e55d3db6857302115efbfc587996050989274a17ad05cc6f152a3

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The critical heuristic firing for CVE_2009_4324 indicates exploitation of a known PDF vulnerability. The presence of embedded and deobfuscated JavaScript streams, flagged by PDF_JAVASCRIPT and PDF_JS heuristics, further supports this. The ML classifier also strongly indicates maliciousness. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for this type of exploit.

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` `0a325cefa013f0d82c25664ff650f6248752e3703bf299445a144989af74e263`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2221 bytes
`legacy_pdfkit_stage_000.js` `630bbd87d4c991442612bbfc5d0e64a58d98100212c3f8e897f80b45684ffd16`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAC8	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.