PDF malware analysis — malicious · 87e8c51bf658f60c

MALICIOUS

PDF

45.6 KB

MD5: 898bdf95c243ef6d852178df494fa45f SHA-1: 8e3e90b89212ae8d4dd573ff17133b74ba90652d SHA-256: 87e8c51bf658f60c5efa902063997ee20ac4e1f9c51ca111143f049b0f7db747

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability in Adobe Reader, specifically targeting the Collab.getIcon function. The JavaScript is obfuscated and appears to decode further layers, ultimately aiming to execute an exploit stage. This indicates a delivery mechanism for a secondary payload.

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` `d9e7a7f13ad1d8dedcdb43dd0e943a0760d9f93e6109c6240e2c6d865f884554`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9187 bytes
`custom_b64_stage_000.js` `a792c83f4d1b081a8116d179e694618731107240393561f96a29aed7a6e6885d`	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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