PDF malware analysis — malicious · 79d83f59a33d2b40

MALICIOUS

PDF

45.6 KB

MD5: bc9e18f48631dd84f839deda1db4b246 SHA-1: 65eadf2d351a0f7816dc2955b2f948479b2f2d70 SHA-256: 79d83f59a33d2b402104e89f94a5746cc295a23ced9b77318ffa9409d0f59ca8

98 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that utilizes the Collab.getIcon method to exploit CVE-2009-0927 in Adobe Reader. The JavaScript is obfuscated and decodes further layers, ultimately aiming to execute a malicious payload. This indicates a delivery mechanism for a secondary exploit or malware.

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` `e5467fc55210de7993770b63768697e91e32f0cc6d517ab21bf5e7a38b68642c`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9187 bytes
`custom_b64_stage_000.js` `b6ee1b9049b16007399e347449fa6f9aea93c8f9a855b5feb7e675453da2a14c`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1511 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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