PDF malware analysis — malicious · dbd27e6a51663b14

MALICIOUS

PDF

45.9 KB

MD5: c6bc9716dea8aa797e118a3172d5b28c SHA-1: 7ec8e79b4ea3d765b593083c80dbb7ec0bef608a SHA-256: dbd27e6a51663b14918f46a7a1ad1f10d80128f1dbaf171af8ee6008842e38e9

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: User Execution: Malicious File T1071.001 Application Layer Protocol: Web Protocols

The PDF file contains obfuscated JavaScript that exploits CVE-2009-0927 using the Collab.getIcon method. This exploit stage is designed to download and execute a subsequent payload. The use of custom Base64 decoding and layered obfuscation indicates a deliberate attempt to conceal the malicious 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` `6fad2d9529c010cec19dd49c12be97024a71a48ea6265f8b831e8f81ccf247c4`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9243 bytes
`custom_b64_stage_000.js` `a3e0e1dad0dd8c387eb73c53516adf575ede6f00526d1dd5842dd3cd05cb80cf`	deobfuscated-js	custom Base64 decoded JavaScript layer 2 (PDF /JS object 8) at offset 0x8A7	1523 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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