Drupal 7 Entities - Fetch entities using EntityFieldQuery.

entityfieldquery.php

<?php 
  $entity_type = "node";
  $bundle = "my_custon_content_type";

  $query = new EntityFieldQuery();
  $query
    ->entityCondition('entity_type', $entity_type)
    ->entityCondition('bundle', $bundle)
    ->fieldCondition('field_dwnl_file_content', 'value', 9);

  $result = $query->execute();