PDF malware analysis — malicious · 4ec0a06912d8ad50

MALICIOUS

PDF

1.4 KB

MD5: 896b737bf665e3e67c1769394986281f SHA-1: 927d700cb12ee183b96fb6985366065ff6bf6e64 SHA-256: 4ec0a06912d8ad50b479e8617b3f1ee70524a9c93e415ef93516aad0c164c1e1

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 Command and Scripting Interpreter: JavaScript

This PDF file contains embedded JavaScript, which is obfuscated and uses the unescape function. The critical heuristic firing indicates exploitation of CVE-2009-4324 via the media.newPlayer object, likely to execute the embedded JavaScript. The JavaScript is designed to download and execute a second-stage payload.

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_obj111711_000.js` `8b50be2df1eb8d362314afb2b0be0b867953986946aff5a5688379a175744075`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x160	1231 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_obj111712_001.js` `d3ca6936764ab0389e9037866e489dd11fc805a74234d424db87054aa194f047`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x478	252 bytes

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