PDF malware analysis — malicious · 522cf9b1debabc76

MALICIOUS

PDF

46.2 KB

MD5: 4586cfb89eb4eda7af36f01137c4a592 SHA-1: 028ecbc9d77c839e4f99d30558e77d0320c6e90c SHA-256: 522cf9b1debabc767eb304d8f3d93b35201646db93ef4885d7da3ffbe6797e30

78 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript and triggers CVE-2009-4324 via the media.newPlayer API. The deobfuscated JavaScript, specifically 'legacy_pdfkit_stage_000.js', appears to be responsible for executing the exploit. The script's obfuscated nature and the use of a known PDF exploit indicate a malicious intent to compromise the user's system, likely by downloading and executing additional malware.

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` `0d09cc1f4ed578ca5322a86f71b176e14ef9be46b11826e7c01ee878f0c2d724`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2578 bytes
`legacy_pdfkit_stage_000.js` `d7155f873b59e589a73c704be477a30cf4921d43cb2c81abc4b0960cad6f3280`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC2D	1220 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.