PDF malware analysis — malicious · 0556278ffb8438b1

MALICIOUS

PDF

2.4 KB

MD5: 8bc96ea15d00dcd75d68d402104ce3c6 SHA-1: d1c7792de8389ced3da7937c3b84f098f3ade247 SHA-256: 0556278ffb8438b1f9cd41e7e74e5d32d7c43a98b646cedd0817990cc7eae990

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file that contains obfuscated JavaScript. This JavaScript utilizes an eval() call and exploits CVE-2009-4324 via media.newPlayer to execute arbitrary code. The script appears to be designed to download and execute a second-stage payload, indicated by the complex string manipulation and function calls within the 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.
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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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` `43281a8129b327d3f53fec65b8ed56b0ed632ac46f74ed7e01d4b2208187afdd`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	1898 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0005_001.js` `a4a39a95112adeb7becbe348ae769bf8a4316eb18c0ca19b042a5144275ca0a0`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	42 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`combined_document_js_000.js` `9c978e8870c86b3255a02a3eae0a255aca0f1e850f545cd137df423088542702`	deobfuscated-js	combined document JavaScript streams at offset 0x117	1941 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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