PDF malware analysis — malicious · 686ff50b30749336

MALICIOUS

PDF

1.4 KB

MD5: bea014225c0319eef87b75a3dd49832c SHA-1: 0ed96751ed4d7dbb9012cbc9b2b8dbe61774c448 SHA-256: 686ff50b307493363c89669aa6362f141eb5bf09a7546ff7dcb62f735416a9e9

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains JavaScript that exploits CVE-2009-4324 via the media.newPlayer object. The script is heavily obfuscated but appears to prepare for and trigger the exploit. The primary goal is likely to download and execute a secondary payload, as indicated by the exploit cluster and the use of JavaScript.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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. (matched in decompressed stream)
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.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj111111_000.js` `534a4bfd45dfcae0d489908f3d512502c19b8a4d36adbfded64d349965004821`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1261 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `1804280d86d9edaeb0f07fd456ff4c9c0f8adeedf3038fa5a2c36a4e88a12e13`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x487	263 bytes
`combined_document_js_000.js` `f9f8fd9e10efcdc3b2b933e331ec679ceaffa11dcd2fa05255a538501cb60ad3`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1525 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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