PDF malware analysis — malicious · 14e41931b799d544

MALICIOUS

PDF

1.4 KB

MD5: e9201dc0ac7129adef8cd8e48e1dfa00 SHA-1: ba7c6b648f18a4d13d7aaa54d5a71e57ca716c87 SHA-256: 14e41931b799d544cbfd8b0f9747e52b23fe13d9a9954f9e55e60f02d288bf9f

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages the unescape function and exploits CVE-2009-4324 via the media.newPlayer call. This JavaScript is designed to construct and execute a malicious payload, likely a second-stage download or exploit. The ML classifier strongly indicates maliciousness, and the specific exploit cluster points to a known vulnerability.

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` `9ab35dba8a58bae44ee342d14021ece3fff9cbd0cd1c3979f42dc7b6a9f48c1b`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1254 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` `60ea77bd89e8dd732ed4237844165713f8aa381c92f28afee69d11c097b5fccf`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x485	260 bytes
`combined_document_js_000.js` `6ad50f39194f2cfd0922ab4ca85b810ca85f2f3833d51c1e243a724e09968bfb`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1515 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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