PDF malware analysis — malicious · da603c23b1426806

MALICIOUS

PDF

18.0 KB

MD5: 7688561ba2de84eec5ceec2cdcd4e42a SHA-1: d78b1e966690cc209689fa1b1f724cc0da00f248 SHA-256: da603c23b1426806ab6fee4871a32f640b553c440dbfb093682579ba01695cc0

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains obfuscated JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and a critical CVE-2009-4324 detection. The embedded JavaScript uses eval() and unescape() functions, and string concatenation to hide its true functionality. The critical alert specifically mentions a 'multi-marker percent-array decoded JavaScript' and an 'encoded stage' related to CVE-2009-4324, suggesting the exploit is designed to download and execute a secondary payload. The deobfuscated scripts confirm the use of eval() and unescape() for code execution.

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` `13d0b3a52c982d4e0f8c8f0bb7caacee20347e2759c93ceeb13e8848541da46b`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3290 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` `bc19bbb664477bbbf034072a8a939edc2879fdacaba4891bb0e40d37678225a5`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xE9E	12197 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_obj111713_002.js` `b293495f339e2be94182033ec8634bf130bd745ae55d10aa75893f533537e590`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3E79	2396 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` `3cece914b914841a8b17f6d40f0553e78ef8ed60e76aa68605abeae7e560099e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xE9E	1081 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` `cd7088aa0ba5ce42db7faac79c4063dccc339c8953139714658e9cb6b07c91fc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3E79	165 bytes
`legacy_pdfkit_stage_002.js` `323c6ce3f5bdec0f0b1b46427d81d56be2a318650a0a004998082b9d17c39310`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xE9E	1247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.