PDF malware analysis — malicious · af11fcacbf9a1ecb

MALICIOUS

PDF

45.8 KB

MD5: b20713025bfb2da020aafc422f280e43 SHA-1: 03ddd318c7fa3cc0b8aff2b9e1866cd2ccf168d3 SHA-256: af11fcacbf9a1ecbbf73d190af72639bbc3fbe26bb107cc21a385e3e3847704f

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.001 Malicious Link: Malicious Link T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that is obfuscated and decodes multiple layers. The critical heuristic identifies this as an exploit for CVE-2009-0927, specifically targeting the Collab.getIcon method in Adobe Reader. The deobfuscated JavaScript likely downloads and executes a second-stage payload, indicating a downloader or initial access stage of an attack.

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` `f5791617ffd9ec511b9bafd4b0926f62ed6ad48db954ff9c48c651716f421fe4`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `7f81d53001748b02d407ba117c69306bcb432633128cfd056fcb976dcfed5c76`	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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