PDF malware analysis — malicious · 36c0451efac0bfb6

MALICIOUS

PDF

12.2 KB

MD5: 27068c8e1f1c036a124ccaef43caae06 SHA-1: 1fa0730f80b0ae919a3995b5773746403f1f5d13 SHA-256: 36c0451efac0bfb68bf8dc70732cd5ae7db19f9de87cc87ab79f9850522f4a55

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of Collab.collectEmailInfo for JavaScript execution, indicating an exploit attempt. The ClamAV detection further confirms its malicious nature. The embedded JavaScript streams, deobfuscated into legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for the exploit's payload delivery.

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` `b9b6296633acd12f140c5481313b65e1bdda06e3729a8d3acb0a5169926e82b5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11823 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e86591a6b6d7be20765b7bcc4b2f0a1a381fef825fe528c9d2a75756bcb4c8cd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4876 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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