PDF malware analysis — malicious · 9891d5418b7dc661

MALICIOUS

PDF

45.0 KB

MD5: 9184f55f526f08b943415d080280c9d3 SHA-1: 7cb7c1cbc0a836027fb9769f9e598e6c2864bf09 SHA-256: 9891d5418b7dc661b934e52cfe1547e0382cf536356186894dbceb0e2432e730

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ClamAV detection 'Pdf.Exploit.Agent-36128' strongly suggests it's a malicious PDF exploiting a known vulnerability. The embedded JavaScript, though large, is likely responsible for downloading and executing a secondary payload, a common technique for initial access.

Heuristics 3

ClamAV: Pdf.Exploit.Agent-36128 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36128
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `ff7b143580b9c540647c0ad925b6b25ca1cfa7d07c63addb105b91209a98d031`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	45305 bytes
`legacy_pdfkit_stage_000.js` `7cb2d61dec1926997ae232ad6e46a30b028a12c3e9b77220bd00b6b686646f3a`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x1E7	33047 bytes

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