PDF malware analysis — malicious · dfce5be7a3ba12f7

MALICIOUS

PDF

45.5 KB

MD5: c9bb8ef06bdc7f40a81a3d61843b75e7 SHA-1: 670e7580c0c764e43056c8ad67216717519a2450 SHA-256: dfce5be7a3ba12f762b98a6a75c18f7958760f2f7b0a08f985546c7da161e511

98 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that utilizes the CVE-2009-0927 vulnerability in Adobe Reader. The JavaScript is obfuscated and appears to decode and execute a second-stage payload. This indicates a downloader or initial access exploit.

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` `0993545a76fa5f219710a36134baf294e3afad5707b686020087c555bd0f2954`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9171 bytes
`custom_b64_stage_000.js` `8962663480b50385e84dadff246802a17f015c3b9dda4659a1f0e4aba7e05042`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1505 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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