PDF malware analysis — malicious · 30c779632fcf75cf

MALICIOUS

PDF

12.5 KB

MD5: fefc3654a4f20c56f89081a8bde86181 SHA-1: 5f7bf45474498e8c3951272532d1ba0813d450b9 SHA-256: 30c779632fcf75cf4af8c66fa3fa3ebbb153dfbd99ce25cc821991e64696bced

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of a known exploit technique involving the 'collab.collectEmailInfo' JavaScript function to execute arbitrary code. Deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', were extracted, suggesting a multi-stage attack. The primary intent appears to be the execution of this JavaScript to download and run a secondary payload, as indicated by the ClamAV detection of 'Pdf.Exploit.Agent-36062'.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `7617ad49423596086e4a49b751d3b2bc12b68cec0a0ceda06ecdfddb6382fb41`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12305 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c0d5935c84ed45ce2462c9ac025d321632e1271a6497f1b8f7ca97f5705f28d9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5113 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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