PDF malware analysis — malicious · f49bf0feb10dfb80

MALICIOUS

PDF

45.8 KB

MD5: d5bd4c14e02168a4c1fd25bde83d5a52 SHA-1: 9e0028d77f7f5b92f2648dddf23e03ad03578074 SHA-256: f49bf0feb10dfb8002d10a2b2ccf04832fb28da07506da106ba0d745355ff33e

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.001 Malicious Link: Malicious Link T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/JScript

The PDF file contains embedded JavaScript that is obfuscated and decodes a second-stage payload. The critical heuristic identifies the use of CVE-2009-0927 (Collab.getIcon) and a custom Base64 decoder, indicating the intent to exploit Adobe Reader. The deobfuscated JavaScript likely downloads and executes a further payload, though its exact actions are not fully detailed in the provided evidence.

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` `b5b08d844bbe100357fe60dd0c1a13acd400a212db94c91a9f83cc70ec996acc`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1D3	9215 bytes
`custom_b64_stage_000.js` `c758a3d571860004941ced41288cb45fa2ed653000a5aaa70f2b11a50dcf5f41`	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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