Whatspp Integration

Hello
I am using the plugin in a form at this address https://www.acgassessoria.com.br/guia-de-encieveamento/

I am using the option to send a copy of the pdf to the email that the user informs on the form

I would like to know if there is a possibility of a copy of the pdf being sent via whatsapp to those who fill it out.

This is a question that my client brought me.

Would something like this be possible? even if some type of programming is done?

Thank you