PDF malware analysis — malicious · 444ff3f728817875

MALICIOUS

PDF

45.8 KB

MD5: 8250109e437332d180cc0141b90c443b SHA-1: dd781140e6bb906dffec1f045263a028d68d8eff SHA-256: 444ff3f728817875ec43c07a6148f3d2ce8f496b2a538271557eae11f7e9ac02

98 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File Execution

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` `89d4299736f5f1ab5d4ca20b6c2485359f2ade781682bcacd2917199d38ccff9`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `45f298ae32fe7ca4cb8c50528c5b70119b24847594b6c43fbb3b9e270f383eca`	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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