PDF malware analysis — malicious · 2c88ffcd1f60ebcb

MALICIOUS

PDF

75.6 KB Created: 2009-12-12 19:47:82 Authoring application: PDF Library 3.1.4 (via PDF Library 8.3.7)

MD5: f1fac9c646cce303040b46e07c68a49e SHA-1: 1f0b58b9436ab7fe710ac991ba2d7f3b676391bb SHA-256: 2c88ffcd1f60ebcb9758b30142fa22c56a4ca25151ecb4f6990d147b04c171a4

338 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings indicating exploitation of Adobe Reader vulnerabilities CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits target JavaScript execution within the PDF. An embedded and deobfuscated JavaScript file, 'legacy_pdfkit_stage_000.js', was also extracted, which likely serves as the second-stage payload. ClamAV detections further confirm the malicious nature of the file and its extracted components.

Heuristics 9

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.Exploit.Agent-36110 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36110
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` `5fc421c949c1ad3a24b67fdf5c15cb918157222d8aa94e6bc364d932494b6f17`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	38197 bytes
`legacy_pdfkit_stage_000.js` `a961a28cd1ab5ec23f8fa5b72fc44ab6a4f6465d3b7348a5af4376420454efcc`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	10012 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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