PDF malware analysis — malicious · 6a6a9f3612124cc9

MALICIOUS

PDF

1.4 KB

MD5: eb1568307e571371ef14c91eb9adacd2 SHA-1: cf608e6272e7f9c3aa23befc3b4824ff0db7e9e4 SHA-256: 6a6a9f3612124cc9d389455c43ac2bf536207154bcf564047bbdd833bc8587d8

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains JavaScript that exploits CVE-2009-4324 (media.newPlayer vulnerability). The script attempts to download and execute a payload by leveraging the unescape() function and constructing a URL from concatenated strings. The ML classifier strongly indicates maliciousness, and the critical heuristic firings confirm the exploit attempt.

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` `89dab64fb730015a1b544ccd6506edf541601b310262bc5d5336cf35313d670d`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1248 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` `b16fe6ef16b9f05251bf723cf680811f967b529f09a7a981b105e6933beb3cd0`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x483	250 bytes
`combined_document_js_000.js` `c2464a054818947439b4da663b7aa84f820fecd97ffa608acdf5f68b31423146`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1499 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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