una/modules/boonex/messenger/template/file.html

<div class="bx-messenger-attachment-file">
  <i class="sys-icon __type__"></i>
    <div class="bx-messenger-attachment-file-info">
      <span class="bx-def-font-semibold bx-def-font-normal">__name__</span>
      <span class="bx-def-font-light bx-def-font-middle">__file_type__</span>
    </div>
</div>