PDF malware analysis — malicious · 6b43fd3428ac332d

MALICIOUS

PDF

1.1 KB

MD5: e2dd2b6b5cddfad2e865252228c9a121 SHA-1: 3333fe434515d72d465e66d2c58d91ba716b89ec SHA-256: 6b43fd3428ac332d3f46bfed963a5e6c22f64ecf1d7539587f1dcc995dfa0e1c

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file containing obfuscated JavaScript. The JavaScript utilizes an eval() call and specifically targets CVE-2009-4324 via the media.newPlayer function, indicating an attempt to exploit a vulnerability for client execution. The ML classifier strongly flags this PDF as malicious.

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` `416ce2b1f037f621aff154cdcb8d7ae307c6143042355474254b63f758a04e1d`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	646 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`javascript_obj0005_001.js` `ca02d2d29a61a078e86fe8f9e778118a5673ba00c5c069052a707663f3351299`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	33 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` `7d252d1c6b1ad34f414896ca2f202df2e870fc51bb68f8ff466e82114b2f3a37`	deobfuscated-js	combined document JavaScript streams at offset 0x117	680 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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