PDF malware analysis — malicious · b9e08b5e118ada1a

MALICIOUS

PDF

4.9 KB Created: 2010-02-03 03:50:29 Authoring application: zwc1b82

MD5: bab4d5ad2bfb62c4b371e7360cce6bb6 SHA-1: b65aa605cdd08d5b11d83a1b2e09e7ece7f2d76f SHA-256: b9e08b5e118ada1a6fae9883c3af65e2c87c6eb45e55e25dc3f9fae76d88a0da

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

Multiple critical heuristics indicate exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659 via embedded JavaScript. An extracted JavaScript file, legacy_pdfkit_stage_000.js, was flagged by ClamAV as Js.Exploit.Shellcode-18. This suggests the PDF is designed to leverage these vulnerabilities to execute malicious JavaScript, which in turn likely downloads and executes a secondary payload.

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_obj0028_000.js` `318b4116e10f0b915c606126ebbca99571c7e8114b74892d184984855d775fd1`	pdf-javascript-stream	PDF /JS object 28 at offset 0xFF9	310 bytes
`legacy_pdfkit_stage_000.js` `cef8178953344f911afc04ca28d008e2416ac94575819d5c0941cfabe8062a5a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1EC	7103 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 18 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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