Its a fake webpage you open as a local HTML page. It will load in the web browser and look like a website but its not running on a remote server its just opened on your machine. Theres some javascript at the bottom that appears to post all of your information to a server hosted somewhere else. Would be easy to spam it with fake data and destroy their collection. Its posting to this URL https://quorumgroup.com.ph/book.php
That code starts on line 1300 of the file. It seems to parse the inputs as a string and post it to the server as plaintext