PDF malware analysis — malicious · 7fb9bdd1efe90dc9

MALICIOUS

PDF

1.1 KB

MD5: 9d5655f2e6a9c382f9c0802bc4515122 SHA-1: 468988ff18eef3195a6b8ab448c0f67e2a47a8e3 SHA-256: 7fb9bdd1efe90dc90e5dbdcfdd37cd6047d5b48bc439ff922867865fd08caac3

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes eval() and attempts to call media.newPlayer, indicating an exploit for CVE-2009-4324. The JavaScript is obfuscated and appears to be a stage recovery mechanism, likely intended to download and execute a secondary payload. The ML classifier strongly flags this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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
Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY

Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
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 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `2b74db42dec3fa5b8a6a318d04db5f85268e74ebb21b1cc62bfb9fbbdd7db1a4`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	642 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 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).
`generic_stage_recovery_000.js` `9d5f546005dce1de11e2480b257ccff619acdf5f8fdacea2be057d7d5f80df6e`	deobfuscated-js	generic stage recovery split-literal-normalize from JavaScript object 5 at offset 0x117	639 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`generic_stage_recovery_001.js` `18ac903a84ecd0529da9d903b6377582cbee921e26d67f6aa5e8b56dfe3118a6`	deobfuscated-js	generic stage recovery split-literal-normalize from combined JavaScript objects at offset 0x117	673 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`combined_document_js_000.js` `8c627cc4287a272091741e8f416592c8c1f4fb70cb6df7be3345caa49b2d35c0`	deobfuscated-js	combined document JavaScript streams at offset 0x117	676 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.