PDF malware analysis — malicious · 3240a3c7224e5394

MALICIOUS

PDF

17.9 KB Created: 2010-01-01 07:27:45 Authoring application: Fexaxououazobb

MD5: 6294a461036787099c9360685fe80ce0 SHA-1: 2516255d45b84c46a8b5c0e95119dea9bca0e39b SHA-256: 3240a3c7224e53945048903987952247e55c219973285aaad31d354e43abf910

318 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 through embedded JavaScript. ClamAV detections further confirm its malicious nature as a dropper. The embedded JavaScript streams, particularly the deobfuscated 'legacy_pdfkit_stage_000.js', are designed to execute shellcode and likely download additional malicious content, contributing to the overall dropper functionality.

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)
ClamAV: Pdf.Dropper.Agent-7246539-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7246539-0
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `e46950f822342ae4f2dd4bec64d1799ad902c1dd893c54e92ec6c7ef11ab46cf`	pdf-javascript-stream	PDF /JS object 12 at offset 0x483	1092 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `b04e274dcc09e2da4e1c86a770385a99a87df802810cafbdea1a9283beda8d3a`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	1547 bytes
`legacy_pdfkit_stage_000.js` `6c38a37be8e1c26c8595065a957af3bd32648d19b9fe65b8cd9f588506979490`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x747	32712 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 74 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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