Malicious PDF / .PHP — malware analysis report

Static analysis result for SHA-256 a51b288c6e5dd955…

MALICIOUS

PDF / .PHP

37.3 KB Created: 2010-04-11 20:43:28 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))
MD5: 45dfb39ab93924c2c6759f4a91c2a5df SHA-1: 21d23bab9eec750f1b16cd6640ff0d2d48c7ecc7 SHA-256: a51b288c6e5dd9550185987cb365c40a5a71f3efcaeeef6c7af352e855707c2b
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-22599. Static analysis revealed embedded JavaScript within a PDF structure, triggered by an optional content group. This JavaScript is likely designed to exploit a vulnerability and download a secondary payload, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristic firings.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-22599 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-22599
  • 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.

FilenameKindSourceSize
javascript_obj0010_000.js
eeb4dba715be089c971856e9150e548b2038177e3c0726dd2c524161648a4865		 pdf-javascript-stream PDF /JS object 10 at offset 0x8AE7 1344 bytes

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