PDF malware analysis — malicious · f8164eb18f035a68

MALICIOUS

PDF

11.9 KB

MD5: e9330731cd8159562c87162b8f819044 SHA-1: ef72e4bd1e0b73c832d2e23b340d84a64363d0f2 SHA-256: f8164eb18f035a685e61da25679a898c06d39f39e7fdb9313daa8db86f46a840

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' heuristic indicates the use of the 'Collab.collectEmailInfo' JavaScript function, a known method for exploiting PDF vulnerabilities. This function is used to construct and execute JavaScript, likely for downloading and executing a secondary payload. The presence of deobfuscated JavaScript files further supports this. The ClamAV detection 'Pdf.Exploit.Agent-36065' confirms the malicious nature of the file.

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: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `c2b7a7d04bf6d0d2fd08d2f91bb46d8057a4107714f35c5c34c5fee9d3821014`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12327 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `03f3325abdf488b83c0e6dee2eb56c9289f90436727c4aca018ebe378451f221`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5108 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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