PDF malware analysis — malicious · 42cbdb18fb399085

MALICIOUS

PDF

8.8 KB Created: 2009-11-11 19:45:35 Authoring application: PDF Library 6.7.7 (via PDF Library 9.6.4)

MD5: e72933d9fa6f2e3aa7c82c49fced3a7c SHA-1: d859d74b1b1a4ee3986d68980b9f912d8518cc31 SHA-256: 42cbdb18fb399085c2e8a9d891a163d8a6d2387f48925609683eb336b9f12330

280 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that exploits multiple known Adobe Reader vulnerabilities, specifically CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits are designed to download and execute a second-stage payload, as indicated by the ClamAV detection of 'Pdf.Dropper.Agent-7254887-0' and the presence of deobfuscated JavaScript. The attack pattern is consistent with a malicious dropper leveraging outdated software vulnerabilities.

Heuristics 8

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Dropper.Agent-7254887-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7254887-0
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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_obj0007_000.js` `c9f23484e4b76ea67eb8e685de357d7bc049e788343f4a97cd849bf24a6f6944`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37216 bytes
`legacy_pdfkit_stage_000.js` `e3817cc9ad1f7f910442eaa4572244257e9776624400308dbcfc1c533c309be9`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9850 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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