PDF malware analysis — malicious · 0544c9edbae0f8c1

MALICIOUS

PDF

2.0 KB

MD5: 401b789c4fe1c8ee5cc88b8e5f2bc713 SHA-1: bb0d6a8163fc053310a24aaa3ff631395731eaf1 SHA-256: 0544c9edbae0f8c12ad7e40a6ad6594a956273976b1af8225d1a9f91fbd176d9

268 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that attempts to exploit CVE-2009-4324 via the media.newPlayer function. The script performs a heap spray with a shellcode payload, indicating an attempt to achieve arbitrary code execution. This is a common technique for delivering further malicious payloads.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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.
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.JSCode-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.JSCode-1
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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_obj0005_000.js` `4acbab9938f0aad0e7a8853c19bf2029286d16ffd02e4720419f47847386a360`	pdf-javascript-stream	PDF /JS object 5 at offset 0x124	1478 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `66b0e774d674fcf97f0a730404863c25d04e72e02edcf7e6c2a4581b1295b317`	pdf-javascript-stream	PDF /JS object 5 at offset 0x124	40 bytes
`combined_document_js_000.js` `243a5b8a4d9cbe165247d373255250bc9e0d71981b0b793b45b0a776076b5a26`	deobfuscated-js	combined document JavaScript streams at offset 0x124	1519 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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