PDF malware analysis — malicious · b1da3d5a343ab794

MALICIOUS

PDF

12.4 KB

MD5: 1eb909e1aa34aa8d78ab4a321019dd27 SHA-1: ff2eba6603cc0dde6101373d91a993a1f4488117 SHA-256: b1da3d5a343ab794b82d52761da9a138fbbf00e047f1061ab1200b63bf92475e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical heuristic 'CVE_2007_5659' indicates the exploitation of a known PDF vulnerability using JavaScript. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') suggests a multi-stage attack where the initial PDF acts as a dropper. The ClamAV detection further confirms its malicious nature. The overall attack pattern involves exploiting a PDF reader vulnerability to execute malicious scripts, likely for downloading further stages.

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` `96a4c125e450bc43b4e7cc007d01ba9704d78ff93a352404bf0f10da832d8d51`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12196 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ce0ccd71237d638b4fe7d24008a56f61899dd2152f76b4dd45c9e14a4803aecd`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4987 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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