PDF malware analysis — malicious · 2a0e8e2669b562e0

MALICIOUS

PDF

18.6 KB

MD5: 4b323fcf0cbc190ed0b6fb781e399f8b SHA-1: 46ca29dd658fd4a7b708b5e34b4c3f0c37373cb7 SHA-256: 2a0e8e2669b562e0ffd0acd4e443ce677fcfd401798910492aa63ffc8481c104

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains multiple embedded JavaScript streams, with a critical 'eval()' call and a specific CVE-2009-4324 trigger identified. The JavaScript is heavily obfuscated, but the presence of 'eval()' and 'unescape()' suggests it's designed to deobfuscate and execute malicious code. The primary intent appears to be exploiting the CVE-2009-4324 vulnerability in Adobe Reader to achieve arbitrary code execution, likely for downloading and running a secondary 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. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `ffc11376f42addcfdbfa38f5b754026fd7ce962cacf30bb37b0f9b5810d2fc2c`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2970 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `74e8c523edbe13bc38b57e4900ca64bf50169760907eb29062ba025202e823ef`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD5E	13094 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111713_002.js` `24769b2a35e5913ac5e2ccb09d16734da850f19a3bbc01abc0de44b94701b949`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x40BA	2440 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `34f01afd47ab7ba2db82968974a10f81bf91b8ffa4d8c84deb4591b02615e50b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD5E	1088 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `55c7d010cdd544b079f6005714d39896eaf4a9c2126376cb3e561840bd41d64e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x40BA	175 bytes
`legacy_pdfkit_stage_002.js` `823a014763d2bd61933cd39ef604e2f7f579d9f72c93f633d02aa70d53c5412f`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD5E	1264 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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