PDF malware analysis — malicious · 9143557b4ff82e4f

MALICIOUS

PDF

45.8 KB

MD5: 9836b678064d37c82835857b6ea5e806 SHA-1: e8d0e7223d6f7b60bc4bb69ba611704d65ce159a SHA-256: 9143557b4ff82e4f880a6db6ca6dd69ede678ad422d6b386e8b36e4a11896d8e

98 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that exploits CVE-2009-0927 using a custom Base64 decoder. This script is designed to download and execute a second-stage payload, indicating a downloader or dropper functionality. The exploit targets Adobe Reader specifically.

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` `2e73ca2e8d44e62e69f7f0e1b50e1cceab5aae9ad5165fee9b7722e599c1aa7e`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `e3a7ca30ac91cfafa9228de2d29f94fb467306783cb64a360507d89671ec2705`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1517 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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