PDF malware analysis — malicious · 6afa3b9d7b1956c6

MALICIOUS

PDF

1.3 KB

MD5: a52fb67572b750242416028f47fd9a66 SHA-1: 459f721bffe4f6ce4c7545b97d85856794db5b39 SHA-256: 6afa3b9d7b1956c6281bca7b3026455df780185715cd4e6c0ae5f55358bf328e

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample is a PDF file that contains embedded JavaScript. The JavaScript utilizes eval() and exploits CVE-2009-4324 via media.newPlayer to execute arbitrary code. The script's primary function appears to be the exploitation of this vulnerability, likely to download and execute a second-stage payload.

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` `051b82fa52f35829253d7d10f791b677b008f2c69e8cd4cffacebb5187f5dc15`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	810 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 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` `1cc7a95f326eb57e68a551d94637d7a5fc1b01b011407d809262e6cf75c90651`	deobfuscated-js	generic stage recovery split-literal-normalize from JavaScript object 5 at offset 0x117	807 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`generic_stage_recovery_001.js` `5a08d3d5fc49ccb9e27f8530598ad4d084ef2febd64d9422e7611a185b0f2451`	deobfuscated-js	generic stage recovery split-literal-normalize from combined JavaScript objects at offset 0x117	841 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`combined_document_js_000.js` `f74526b5c66ddaa8f9c73a1f44d43e68fd541b70c345745eb1bbf2ca3dd8567c`	deobfuscated-js	combined document JavaScript streams at offset 0x117	844 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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