PDF malware analysis — malicious · 74c8f6af1e1fa420

MALICIOUS

PDF

6.3 KB Created: 2010-02-13 03:03:20 Authoring application: ab153a

MD5: d7a76e9dbd4fff0051650066d7f6c9fe SHA-1: dd166cc0ee7e90778e509fd8a46c76616fe1a44c SHA-256: 74c8f6af1e1fa420c5fc3d89678f55a16aa4a4cfdb1ae2c9799aca4cafef2987

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript that exploits multiple known vulnerabilities in Adobe Reader, specifically CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. The heuristics indicate that this JavaScript is designed to be executed upon opening the PDF. The extracted artifact 'legacy_pdfkit_stage_000.js' and the ClamAV detection 'Js.Exploit.Shellcode-18' suggest that this script is responsible for downloading and executing a secondary malicious payload. The specific exploits used point to a delivery mechanism leveraging document vulnerabilities.

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` `4bf288f9a5ee7859275cd0f98b8e591eb1379883be613781689c3546bde524cb`	pdf-javascript-stream	PDF /JS object 11 at offset 0x64C	366 bytes
`legacy_pdfkit_stage_000.js` `749c0a4e961f5e19e8025524b8a2738086ef30986fcfbb5bb672223b5570b361`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC7C	6271 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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