Send output as PDF during background job

Dear

can you suggest how to send output of schedule job log in PDF as attachment insted of HTML.

If i schedule any job & set spool receiption, then spool log is sent as html attachment,

but i want to send it as pdf is there is any way to change defalult attachment type.

In addition to it can i set message text during scheduling job, or can i insert message text in body along with

attachment. So that i can type desired message in Body, any standard template is available to change its text.

regards

Pranav