PDF malware analysis — malicious · ccd724a5cb81f82d

MALICIOUS

PDF

3.7 KB Created: 2010-02-12 07:26:32 Authoring application: cdb83a

MD5: 6a4bc8a1cd1a9d216a5ce8a76cf940c6 SHA-1: 0d022dfb3c7e157abcfab60a4bc55f6e5130fac4 SHA-256: ccd724a5cb81f82d0dcd3dc3efc23a8bbb1e4df7e36130268485d19969197c0c

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exploits multiple known vulnerabilities including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These exploits are used to execute embedded JavaScript. The deobfuscated JavaScript, named 'legacy_pdfkit_stage_000.js', is indicative of a multi-stage attack designed to download and execute further malicious content. The ClamAV detection of 'Js.Exploit.Shellcode-18' further supports the malicious nature of the extracted script.

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)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `2faa2116e8dfedd55f52685c9abe5704ff88405cce5e3f500bd61f7b9bc5cf19`	pdf-javascript-stream	PDF /JS object 11 at offset 0xB1D	559 bytes
`legacy_pdfkit_stage_000.js` `122bdf167d58ac432828e75816cfaf71961544242dde07b8100a3060bf6c61cb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E0	5750 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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