Create Encoded Payload for Pdf

I am trying to create a malicious pdf file using the exploit "exploit/windows/fileformat/adobepdfembeddedexe" with the payload "windows/meterpreter/reversetcp".

But all the AV's detect it so that's when I decided to try to encrypt it using msfvenom, but nothing I tried has worked. Is there a tutorial on Null Byte/anywhere on the web where it is described how one should encrypt payloads withing the pdf exploit?