PDF malware analysis — malicious · dd17d7165ac8e63c

MALICIOUS

PDF

12.0 KB Created: 2009-11-07 19:43:47 Authoring application: PDF Library 2.4.6 (via PDF Library 5.10.4)

MD5: 35079c7d7b9c450cb01dcc4475cab4b8 SHA-1: 668eb76173dc04e56616b8e10dcb9518937da369 SHA-256: dd17d7165ac8e63c22f22d855beebcaf6a1f47a9f8f28c4c374d3bff29f8acee

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits multiple known Adobe Acrobat vulnerabilities including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. Static analysis identified a deobfuscated JavaScript file ('legacy_pdfkit_stage_000.js') and a ClamAV detection of 'Js.Exploit.Shellcode-18', indicating the script's purpose is to download and execute a malicious payload. The attack pattern is consistent with exploit kit delivery mechanisms.

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 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.
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` `5f532abfa03459d6ca9488d61bbe5756afe5f4b2c661fd2d2e0bf2a0be9dce83`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37764 bytes
`legacy_pdfkit_stage_000.js` `9f5a73b5b05b864171cbc9529bf844c0971b203c987932a39c521e83b99dd708`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x268	9874 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 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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