PDF malware analysis — malicious · 6798d32747b90622

MALICIOUS

PDF

1.4 KB

MD5: ea9ebb71d1d3f780032388e810f44a6a SHA-1: 89c68658c17588f9e44cc30847ad5b8cef05dcd2 SHA-256: 6798d32747b90622e400a54be3c4042035d0cd0e92f57556afd63cb1bf111c3f

248 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript that utilizes eval() and attempts to exploit CVE-2009-4324 via media.newPlayer. The script appears to be a downloader or exploit stage, as indicated by the 'generic stage recovery' heuristic and the use of eval() to execute obfuscated code. No specific malware family could be identified.

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` `255263a79d4c6fdfb70daccc23f6f3f7e1e246d3c7a3e19997e482bb18c4c134`	pdf-javascript-stream	PDF /JS object 5 at offset 0x117	865 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` `0b34ea95c3e6ce64e4cb9a6cb13ec9bdf52a3606e7b4b7e72a2a10421c086ed6`	deobfuscated-js	generic stage recovery split-literal-normalize from JavaScript object 5 at offset 0x117	862 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` `db731f897d7a1b39b13bd5cb05bda2d5e5796f33e22074fa247550c75d6d07cf`	deobfuscated-js	generic stage recovery split-literal-normalize from combined JavaScript objects at offset 0x117	896 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` `af17115f4915575e31245878f233baaeac72d42aafc4332a16c4553229303293`	deobfuscated-js	combined document JavaScript streams at offset 0x117	899 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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