PDF malware analysis — malicious · a0502a74367d515c

MALICIOUS

PDF

45.9 KB

MD5: 61231b6e5a02f2b81e215b8a040e255f SHA-1: 5639ebfbc7ed3f6f4937ef6da5650c17a3faf2bf SHA-256: a0502a74367d515c267195c119700a758492c58788a175f804c5a3c5a4b73ac9

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: User Execution: Malicious File T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that utilizes a custom Base64 decoder to deobfuscate and execute an exploit targeting CVE-2009-0927 in Adobe Reader. This exploit is designed to download and run a secondary payload, indicating a downloader or dropper functionality.

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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `80061a267573af6fb2b3527b753f28bb1eb89f217bd7cc945d4a1bb7e7e99cf2`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9243 bytes
`custom_b64_stage_000.js` `53a1afeb1f1a66706d186d9e1bbde4a63f91611d269e8a328f3481f60eb2aa53`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1523 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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