PDF / .PHP malware analysis — malicious · 0241124177d26b2d

MALICIOUS

PDF / .PHP

36.9 KB Created: 2010-04-11 20:37:29 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: 8875200b324704c1e20bf08bbfd461c3 SHA-1: a5110ca2b03c1dfa121b17a104cc5700a0f951f5 SHA-256: 0241124177d26b2da9bc1ec7832f9cc7a71fd0071d511aa5cc6e2a761fdd6fed

114 Risk Score

Malware Insights

MITRE ATT&CK

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

The critical ClamAV detection and high ML confidence indicate malicious intent. The embedded JavaScript, obfuscated but reconstructible, uses a delayed execution (`setTimeout`) to run a deobfuscated string. This string is likely a payload URL or command, typical of exploit-laden PDFs designed to download and execute further malware. The TCPDF application and PDF structure suggest a targeted attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-22587 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22587
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` `9c44629733f21683cd4c94f635cea393735f0defaf3248dee5a1ac20c35a51a2`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8923	1342 bytes

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