PDF malware analysis — malicious · 8b0f72e1a4bb7c8c

MALICIOUS

PDF

1.4 KB

MD5: 43fcc953d837e1afcdb1405ca6e2ccc5 SHA-1: eb31cde3ba3459fd7a8c51ae546ab0b6c1026ec4 SHA-256: 8b0f72e1a4bb7c8c6a9a0c513ea2515060a6e0ae9cdbc6bea8feecc321d0f795

148 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File Execution

This PDF document contains embedded JavaScript that leverages the CVE-2009-4324 vulnerability, specifically targeting the media.newPlayer object. The ML classifier strongly indicates malicious intent. The JavaScript is likely responsible for downloading and executing a second-stage payload, although the exact details are obfuscated.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `ce8272bfc932b141a15bb4513c18dc393c8ffb9ef5b51549d21abdc8f98db546`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1256 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` `ddaebb2c78cb3aeefefb5f5a05060db4ed753a4c47113c94eb6b071d9af2b1e7`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x487	263 bytes

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