PDF malware analysis — malicious · 32bf3d7d4900c449

MALICIOUS

PDF

45.4 KB

MD5: aa986a2231998378352c9482995060e6 SHA-1: d940bb94f938c74525ecbe2f65cc272fff076709 SHA-256: 32bf3d7d4900c449a13776ee972f72d3ff70b03c28573362168c3c0ad6db3a15

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 utilizes the Collab.getIcon method to trigger CVE-2009-0927, a known vulnerability in Adobe Reader. The JavaScript is obfuscated and decodes a second-stage payload, which is then likely executed. This indicates a downloader or exploit delivery mechanism.

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` `77bdca441729ba479432c7217af7e06fdd0cdf035b7aec70cde2048e41aab0af`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9143 bytes
`custom_b64_stage_000.js` `d6ca2a07e742a5170a6df1940f4d46c296002de85ac5d8ef30f9eb7894542e8e`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1499 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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