PDF malware analysis — malicious · 2470f5241c3aeb81

MALICIOUS

PDF

45.8 KB

MD5: ddba09b6e161da85c8e3f3b83f43940a SHA-1: 39705e7b161c7d444b892356143bf327ebd983d1 SHA-256: 2470f5241c3aeb810d0bf58dc31c3f35aac53e07b81a3336988deadc3db6612b

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, indicative of the CVE-2009-0927 exploit. The JavaScript is obfuscated with a custom Base64 decoder and multiple layers, ultimately aiming to execute a second-stage payload. The exploit targets Adobe Reader vulnerabilities, suggesting a downloader or dropper functionality.

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` `a62f43892708ff5bf6ae46dc81b3d0dac3856338c36f989320b92985570f91e8`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `df714f3f7a0b2324c132e1ddbda1f01ebd4a7439d93d31e094905a8f7da269e5`	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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