PDF malware analysis — malicious · 5b43d9b52c01154a

MALICIOUS

PDF

1.5 KB

MD5: 67663059cce5e2606860ef87e143d138 SHA-1: 9ac0b636082fb7647a92b20254e3196788e594df SHA-256: 5b43d9b52c01154ac893add04159c1d27f76a07c177853644fae83b420f7bdc3

208 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that triggers an exploit targeting CVE-2009-4324, specifically using the media.newPlayer method. This JavaScript is obfuscated and attempts to evade detection. The exploit cluster and ML classifier strongly indicate malicious intent, likely to achieve arbitrary code execution within the PDF viewer.

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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `80d0531cfcfd5f75493ff3aeefeb43b6a7281077b49972807cd2675ac97439ae`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	294 bytes
`javascript_obj111712_001.js` `1559b6b5ff43241ddadc1516941ffa59ef3b4a3dda9469041557872b5852fc62`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x2B3	1964 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111713_002.js` `27f3b109bc63c59e2a8399ab722d92c7b35227805ca771c1aa8cfa43e62747e6`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x54B	79 bytes
`combined_document_js_000.js` `9e6c1b58e5e2277d97040c29a599a23aa5988be0c310b668dbf359d244ba4bc1`	deobfuscated-js	combined document JavaScript streams at offset 0x197	2339 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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