PDF malware analysis — malicious · 6ffed43fc17f7137

MALICIOUS

PDF

1.4 KB

MD5: 4f9d9f4a9e3f76692a845db331a0379c SHA-1: 9bb51b58aab227d6922969b19c57b1e5f5a2b268 SHA-256: 6ffed43fc17f7137a472f1817c5994ccd2b3465381b5a36b0583f18a9025b674

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes the unescape function and exploits CVE-2009-4324 via the media.newPlayer call. This JavaScript is designed to construct and execute a large payload, indicating an attempt to download and run a secondary malicious component. The ML classifier strongly supports the malicious nature of this PDF.

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` `3a7f3d54e49eca9b7c17d1d45e0554e273eea8bae2621f7a4ffe00bc1086d14d`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1257 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` `feed05410b8752bcb401ce7f237a611738f6525e6405d242575e63da7110c584`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x485	263 bytes
`combined_document_js_000.js` `f096bd70c6fc9bcd07601c4abe6f419229f26e18d4fa96b7892acc37af3a84c7`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1521 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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