You can use Cloudmersive API Suite in Mendix. This useful feature will instantly convert any file type you have. If you do not have the Cloudmersive module already installed, you simply need to download it in the Mendix app store and follow the installation instructions prior to utilizing the various features.
I hope it will work.
You have to use ‘Email Template’ , kindly check the link below to download the module.
If you need to generate an Excel file for emailing, then you would probably want to use the Excel Exporter module from the Marketplace. This can generate a FileDocument that you can send in your scheduled event like you currently do with your PDF.