PDF malware analysis — malicious · b65c70ddebd422af

MALICIOUS

PDF

45.6 KB

MD5: da1c60dfd0937c626c03d3b893d3c333 SHA-1: 84b84adbf04eb95bade3e77893f1879c2c4d2da4 SHA-256: b65c70ddebd422af2e3fc650c20ac25af811028430211de637e4d0d9d3f2ca52

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.001 Malicious Link: Malicious Link T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability, specifically targeting the Collab.getIcon method in Adobe Reader. The JavaScript is obfuscated and decodes multiple layers to execute the exploit stage. This indicates a downloader or initial access mechanism designed to compromise the user's system.

Heuristics 5

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)
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_obj0008_000.js` `dffd4157fecf72f26e148f81f2523965ca50310274d6875755059df6a6cd158f`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9187 bytes
`custom_b64_stage_000.js` `17deff36f77f686ce3b5acb324d5cc533f9d1bb9d37f9a9ea44cc1f32f5d25d9`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1511 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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