PDF malware analysis — malicious · 4d6decf81019bf34

MALICIOUS

PDF

3.6 KB Created: 2010-02-12 08:36:26 Authoring application: a4b975

MD5: 3d0004300013eaba12e47b4953f08bf8 SHA-1: 41b269073a0f142bdaa9582d598e6efcd43079f2 SHA-256: 4d6decf81019bf34a8e83cf62a47c5cbd2b736deea235774e4cc4c92c5545f6a

258 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages multiple known CVEs (CVE_2009_4324, CVE_2009_0927, CVE_2007_5659) to achieve code execution. Analysis of the extracted JavaScript artifact 'legacy_pdfkit_stage_000.js' indicates it is designed to download and execute a secondary payload. The ClamAV signature 'Js.Exploit.Shellcode-18' further supports the malicious nature of the embedded 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` `fd570e1cd875ec0e74e5df8c62d9f38f5c9959ac248f8e16bf6e2688d4e0ff26`	pdf-javascript-stream	PDF /JS object 11 at offset 0xCB	544 bytes
`legacy_pdfkit_stage_000.js` `d76729186b9b0ea3425fed29d86a4862bfed58ece9fe478b4fdbb4da586bbff0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x3B4	6291 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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