PDF malware analysis — malicious · aa346ef772163c34

MALICIOUS

PDF

46.4 KB

MD5: a74daf8f9a3bf72b3003be20d85ed94d SHA-1: ad223de9314335cf1522664947c2e2d53b95a6f6 SHA-256: aa346ef772163c34aaf527da3b14bd0d352ec8dd5525f45ba7aa8c731073a86b

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript that is obfuscated and decodes further layers of JavaScript. This script is designed to exploit CVE-2009-0927 in Adobe Reader, likely to download and execute a second-stage payload. The use of custom Base64 decoding and layered obfuscation is a common technique for malware delivery.

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` `7efc1645b909b2a4cab23837aaa6412b94f5351dd3cc7df694de3726c391cad9`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9339 bytes
`custom_b64_stage_000.js` `52288679d6bbb9a11c8036211e56349daacf69cffad4843ab4e717d8f5706101`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1547 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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