Malicious PDF / .TXT — malware analysis report

Static analysis result for SHA-256 43bbd3ad00ff7c23…

MALICIOUS

PDF / .TXT

37.7 KB Created: 2010-04-15 17:23:14 +04:00 Authoring application: TCPDF (via TCPDF 4.8.032 (http://www.tcpdf.org))
MD5: 5dd07416d9f70fd48795f2b34c5982f5 SHA-1: d6a275cc0964cb9156430ed2d0a9695017090394 SHA-256: 43bbd3ad00ff7c230e33f3f0b42ecb41bcf23b9817e24679e0eee8ec84723f31
84 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings and the presence of a javascript object. The ClamAV detection 'Pdf.Exploit.Agent-22741' strongly suggests this JavaScript is malicious and exploits a vulnerability within the PDF reader. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-22741 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-22741
  • 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
d107cd0e7db663a7db30627aec71308975df65744dba2bcda176e641ac8119a0		 pdf-javascript-stream PDF /JS object 10 at offset 0x8C4B 1344 bytes

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