PDF malware analysis — malicious · 414bca445e7ca6b8

MALICIOUS

PDF

4.3 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe

MD5: efbe2d60f490fdf0cb59fcc931f2c8f4 SHA-1: b2053c2444f6a69b941dabcb5d87c6d869ba771c SHA-256: 414bca445e7ca6b8d890e06fd93a936c1b9d025ab5803bd65cfafd3ed6442246

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File: User Execution: Malicious Script T1190 Exploit Public-Facing Application

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged through embedded JavaScript, which uses eval() and unescape() functions. The deobfuscated JavaScript stream is extensive and likely responsible for downloading and executing a secondary payload, although the exact URL or payload is not directly visible in the provided evidence. The file's structure and the nature of the exploits suggest a malicious PDF designed for initial compromise.

Heuristics 8

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)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `c5bb1053ec10ece2abb202a8f6d9a32a70b88c313cf7dc2ab254771f352bc72b`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC72	191 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0016_001.js` `0490a7fdb04c4f7a539cc05e811c7b775cef6e7d7294ddc9f0ed048d6c8cf8ab`	pdf-javascript-stream	PDF /JS object 16 at offset 0xD4D	104 bytes
`javascript_obj0026_002.js` `1ddf8319960679cc19d7733b40aac1fd15df9675dfb4cae8d726f3232f1c2335`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE04	141 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `2426981f932b7f4db2ce8cfaa28d4f6fcd5e270b729447db535211ee995133dc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x23B	6376 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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