PDF malware analysis — malicious · 2f9bc8e846e3513d

MALICIOUS

PDF

12.0 KB

MD5: 1484cdabf85bb7a9deff37f9e02e0bdf SHA-1: b5a21f6ebe7ac9ca3c58d75f21bf7ed5a1a1d9fc SHA-256: 2f9bc8e846e3513ddf34dadd9b3bf1aee6f72a5661a0263ad8ce031fe2dbd0a0

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 CVE-2007-5659 heuristic which specifically targets the 'Collab.collectEmailInfo' method. This method is known to be used in PDF exploits to execute arbitrary code. The analysis also found deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', which likely contain the malicious payload. The overall attack pattern suggests a PDF exploit designed to deliver a secondary payload.

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` `197fd62233026dd8cd6faa00ad6adb7d7db54d4f84bd20ccb36979f3521289a5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11604 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `9427554872a632413dcef44a3627e06f070804d37f8f1908766e44437edcdb88`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4820 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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