PDF malware analysis — malicious · 0169b1873e9b80e4

MALICIOUS

PDF

2.2 KB

MD5: 787d09ca5b72f6c6876d9112ee325ef9 SHA-1: d65d25bdb0363825c1aa47984c626e09a5b811e5 SHA-256: 0169b1873e9b80e461a9c1285c3b6676b3383a814c9303a8b50e30cedb2c38cc

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1190 Exploit Public-Facing Application

This PDF file contains embedded JavaScript that utilizes eval() and a known exploit for CVE-2009-4324 (media.newPlayer). The script appears to be designed to download and execute a second-stage payload by constructing a URL from concatenated strings and then attempting to exploit the media player functionality. The obfuscated nature of the JavaScript and the use of exploit techniques indicate a malicious intent to compromise the user's system.

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` `97c7c689cec8bf4aefdc6a0a5248bc57f6f001d62cc371207437256199e01cee`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	1760 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` `a9e35c95f60bbd1913fb42840a6efe349cb7b064eb4b00fe8d4d428eaa91f248`	deobfuscated-js	combined document JavaScript streams at offset 0x117	1803 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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