PDF malware analysis — malicious · 8f5b17464a0914e3

MALICIOUS

PDF

12.2 KB

MD5: c6b1b66d31b972a432edd6de14ffca13 SHA-1: 7c17cd9fdffcc2cfe669d7e099794c0aed1aac62 SHA-256: 8f5b17464a0914e3fb473ee35393cec95a5777631f3901feb431fe65ea698526

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically targeting the 'Collab.collectEmailInfo' function. This indicates an attempt to leverage a known vulnerability in older versions of Adobe Reader. The presence of deobfuscated JavaScript files suggests a multi-stage attack where the initial PDF likely downloads and executes further malicious code. The ClamAV heuristic also flags the file as obfuscated malware.

Heuristics 5

Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `4da19f853e374fbbe60c96060d5e32aca54afde43087bc442effe645b6813696`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5156 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `afd7015422ddb00faf7fb38fe4de6bb5420507a43e47d15b7337cded42523249`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12263 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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