PDF / .PHP malware analysis — malicious · 6d9d051d977413f0

MALICIOUS

PDF / .PHP

37.2 KB Created: 2010-04-11 20:36:53 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))

MD5: f38658847ea58998bb56d78281152a64 SHA-1: 601db51af8d427a2414c51e77adcbb2c4b8a897d SHA-256: 6d9d051d977413f0f15e198cff81f57b9db04ad5c8ccd5cc6e5f85a05fd78f3e

114 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PDF file detected by ClamAV as Pdf.Exploit.Agent-22583 and flagged by an ML classifier as malicious. Embedded JavaScript is present, which is obfuscated but appears to construct a string 'eval(rqNKTJ93)' intended for execution. This JavaScript likely serves to download and execute a secondary payload, a common technique for exploiting PDF vulnerabilities.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

ClamAV: Pdf.Exploit.Agent-22583 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22583
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` `9a4ca2e759710ac7ba2fa3b8e065a494f984ce67fd809be89d0260a5cc5a4d21`	pdf-javascript-stream	PDF /JS object 10 at offset 0x8A81	1344 bytes

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