PDF malware analysis — malicious · bf015177e43d3297

MALICIOUS

PDF

45.8 KB

MD5: 565c2a7a1aca283ac2e0ea74b6a47821 SHA-1: 656f92216acf7fa974666f41b91f94b0b2567974 SHA-256: bf015177e43d329766e7db6ee0c2820e5cc67acdf341de8fa0d739c79c68015c

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious JavaScript T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript that is heavily obfuscated and utilizes a custom Base64 decoder. This script is designed to exploit the CVE-2009-0927 vulnerability in Adobe Reader, specifically targeting the Collab.getIcon function. The ultimate goal is to download and execute a secondary payload, indicated by the suspicious extracted JavaScript artifact.

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)
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `be752fb46ee58d2ea569cfa214e323220e5a03e0e2fe8f6a2ae1a238766a38e8`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `095d90b9b6cca6f434459b588daa410fcc4b48cd201d0fda55812ddc24f5bf70`	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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