PDF / .PHP malware analysis — malicious · 75362815c0739a95

MALICIOUS

PDF / .PHP

37.8 KB Created: 2010-04-18 03:02:36 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: f45389413223faeeb0c0a9e7d9424a56 SHA-1: 09f2c265930a49400bc34a921a24fa3481bc1a95 SHA-256: 75362815c0739a95f981cc440fc2ff33496357e2fbe7d22c01e0eeb2bcf832b7

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 download and execute a secondary payload. The script uses a setTimeout function to call a function named 'evil' with a dynamically constructed string, likely containing a URL or command. This behavior, combined with the ML and ClamAV detections, strongly suggests an exploit delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-23944 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-23944
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` `cfd0adb4c257bef612693e5163b396b206bcd2b2dcf702f053c7c29864df1ca6`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8CD4	1346 bytes

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