PDF malware analysis — malicious · 73bcd614ed585022

MALICIOUS

PDF

37.8 KB Created: 2010-04-15 22:24:58 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: 3d9ce13f4ee2d71ec423c337820e89ab SHA-1: 06268656ae9c58b534350d1720b44d5a5c0dac2c SHA-256: 73bcd614ed58502211e5b221d69c70416081a6ede985802dc912134a74c98c30

114 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is obfuscated but appears to be designed to execute arbitrary code. The script reconstructs a string, 'eval(ubpfzg5X)', which is then passed to a timer function, indicating an attempt to download and execute a secondary payload. This behavior is consistent with exploit-laden PDFs designed for initial compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-23052 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-23052
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.
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0010_000.js` `362443a2f627760ee6c75c1203803fcb788a6f586767ef62013b1124701ae63a`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8CE9	1346 bytes

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