PDF malware analysis — malicious · edd792e72bae1057

MALICIOUS

PDF

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

MD5: f0039f5111772a91180a5939167594ea SHA-1: 493a6cc076a897d90658dc8062f4e6d02305997e SHA-256: edd792e72bae10575d9a8e3c1abca69ec470aed87535f0c778571d023792da97

240 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains multiple JavaScript streams and exploits known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) that allow for arbitrary JavaScript execution. The embedded JavaScript is heavily obfuscated but appears to leverage eval() calls, a common technique for executing malicious code. The primary intent seems to be the download and execution of a secondary payload, indicated by the presence of multiple JavaScript objects and the critical heuristic firings related to known PDF exploits.

Heuristics 7

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)
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` `a7c49dcba55d954ac9519bef768e810a28260112b0e1f5eecf73eff6e1c86655`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC10	111 bytes
`javascript_obj0016_001.js` `a8b1d9aa92cf056ab49f8d41127b8bc9508e287f9990a8b2f3606033907ad493`	pdf-javascript-stream	PDF /JS object 16 at offset 0xCBB	502 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0026_002.js` `b3906919049b1e24cd4f6cf2387dc1d41ee438c809a0e98816dbb6e1b5b94215`	pdf-javascript-stream	PDF /JS object 26 at offset 0xE42	176 bytes
`legacy_pdfkit_stage_000.js` `7885a25479c7a3011a8cb4b1933d30c416bbf65f584c4bbcf3b90aa9e68b07d3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1BB	6435 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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