PDF malware analysis — malicious · 640936ddee46e75f

MALICIOUS

PDF

1.4 KB

MD5: 0668d61abd8900e3b1a56299fea6514d SHA-1: b86fba2ede773fb8ef6fff4ce4655293c6f5fba7 SHA-256: 640936ddee46e75fe1eb1ef8270ecc5abd2594ec2a8fedb1293aa5265c32e944

268 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript that exploits CVE-2009-4324 via the media.newPlayer function. The script attempts to download and execute a second-stage payload, as indicated by the critical PDF_JS_EXPLOIT_CLUSTER and CVE_2009_4324 heuristics. The deobfuscated JavaScript confirms the exploitation attempt and the use of unescape() for decoding malicious content.

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. (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.
ClamAV: Pdf.Dropper.Agent-7267100-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7267100-0
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `8d4f96615d3e3d3b1097c6e97cefd3db66d83051d965ed54ca1288cb738ff24a`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1251 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `82f3824c6f0ccbb91bce5107a42da99d567a4eba0d506c6ab994d3d849be1f23`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x483	256 bytes
`combined_document_js_000.js` `c56c3da1fb3754ac08b6f8542079eef93c823eb5edd2259de50bd25fbe195027`	deobfuscated-js	combined document JavaScript streams at offset 0x160	1508 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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