PDF malware analysis — malicious · dc840f907d81eee6

MALICIOUS

PDF

45.8 KB

MD5: fc6d78deea1f806ebde625e9131ebebf SHA-1: 26d86b0959c9f1baa74be51c359e767e23a62a5b SHA-256: dc840f907d81eee69ab8fc2ffc1eb640443a0bd7991377b36ab3b8dc4810a5e6

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF file contains embedded JavaScript that utilizes the Collab.getIcon method to trigger CVE-2009-0927, a known vulnerability in Adobe Reader. The JavaScript is obfuscated and decodes a second-stage payload, which is then likely executed to compromise the user's system. The primary attack vector is the exploitation of this specific PDF vulnerability.

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` `f6d4568469b9c4bff8a99ba58740a7477a59149423f289d92e3eb695993989b7`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `eb2479f8cdbc37146bc6ac6effb67c693aa4339a45560b507d396eccf650eb3e`	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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