PDF malware analysis — malicious · e547780124210b56

MALICIOUS

PDF

18.5 KB

MD5: 3b2552cec073174d46190f06773718b6 SHA-1: b8d593578ceef4ca8d5346f3303a83ba403e99fd SHA-256: e547780124210b5697c5fd53458bd3d8f3fb359a35d7c0712baf67fa6ffdbea7

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The PDF file contains obfuscated JavaScript, triggered by the CVE-2009-4324 vulnerability via the media.newPlayer sink. The JavaScript utilizes eval() and unescape() functions, indicating an attempt to download and execute a secondary payload. Several JavaScript streams were extracted, with some being deobfuscated, further supporting the malicious intent. The specific exploit and obfuscation techniques suggest a downloader or initial access stage.

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` `de5f01996b124c841a09203b7ff4a5b7a2020fb919dfb792e9fb2ef56cc72621`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2976 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_obj111712_001.js` `dde0b162132309595e97eeb60f1b8b79b08b6b966a93a76597507de7a54f7675`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD64	12964 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` `d3f6b98c3c04d6d31bbdb924e6361ddf6f4914e4c3fbb8e879895bbffc985e8c`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x403E	2432 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).
`legacy_pdfkit_stage_000.js` `3cece914b914841a8b17f6d40f0553e78ef8ed60e76aa68605abeae7e560099e`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xD64	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 0x403E	165 bytes
`legacy_pdfkit_stage_002.js` `323c6ce3f5bdec0f0b1b46427d81d56be2a318650a0a004998082b9d17c39310`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xD64	1247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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