PDF malware analysis — malicious · 741f5ceae497ab71

MALICIOUS

PDF

73.4 KB Created: 2009-11-30 19:41:40 Authoring application: PDF Library 9.1.7 (via PDF Library 6.2.3)

MD5: cbfb3e031b251bf83a792f04b8eb75ce SHA-1: 45527901a0def242d77889d9e8c075bf5b5f751b SHA-256: 741f5ceae497ab7196f2d12e7ae04155a333173cd2d52d99e9a8d4eb04615b96

338 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains embedded JavaScript that leverages multiple critical vulnerabilities in Adobe Reader, specifically CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). Static analysis identified these exploits and also detected a malicious JavaScript payload (Js.Exploit.Shellcode-18) within an extracted artifact, indicating the file's purpose is to download and execute a second-stage payload. The ClamAV detection of 'Pdf.Exploit.Agent-36110' further confirms its malicious nature.

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` `0cdd5ed26d0a359eb476e0ebb8d6f0428cb8524a97de33fcc6d67cc56a4ee505`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	37095 bytes
`legacy_pdfkit_stage_000.js` `9ba5bd9f11b9f6f6b2b196776df3e0c6bb60a6d44f28107c395099fd1c633299`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	9796 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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