PDF malware analysis — malicious · f7796b7c9e97438b

MALICIOUS

PDF

46.8 KB

MD5: a10008e78d9e577a536922dd2e30b72c SHA-1: 172ae67f5fb964d038ba77fb6870ff41b0c73d48 SHA-256: f7796b7c9e97438bea6b5aa430cfb96c6309f853940883f0cb98783474e3cddf

98 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF file contains embedded JavaScript that utilizes the Collab.getIcon method to trigger the CVE-2009-0927 vulnerability in Adobe Reader. The JavaScript is obfuscated and appears to decode further layers of malicious code, ultimately intended to download and execute a second-stage payload. The exploit is delivered via a PDF document, indicating a user-execution vector.

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` `06f5acaab2629975553dc8487ea3b1825fe2db06a3946ab765de0b78cbd570b3`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9439 bytes
`custom_b64_stage_000.js` `cb742a805b61c0c566a3a0fc907058d839399fc4678f1e0c6afc7603fc28f234`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1571 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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