PDF malware analysis — malicious · f1a0fe5085118f04

MALICIOUS

PDF

4.9 KB Created: 2010-02-12 12:49:32 Authoring application: zw586a4

MD5: 73e0969dbf8dd4612f92d3e5f64b3492 SHA-1: 9cfd746809b556837b39c10e0d483dbd98de2544 SHA-256: f1a0fe5085118f0418e0504291a249c11b419d178bfd3a341c73dcd2774cf738

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits multiple known vulnerabilities including CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. The heuristic firings indicate that the JavaScript is obfuscated and designed to execute shellcode. An extracted JavaScript file, 'legacy_pdfkit_stage_000.js', was also identified as suspicious. The primary attack vector appears to be leveraging these PDF exploits to deliver 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` `12ce5bb4ae2af631547d6bc6571e9f0ab9eb2c57b83dc5a7dab7468f3184c5d4`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1024	320 bytes
`legacy_pdfkit_stage_000.js` `3a9992267947f4d3ff469f3de50d4c995d81a84f049843ecb43f77626c8a409f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1EC	7344 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 15 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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