Yes, this is possible. Use the parameter MAILCOMB in the DRIVPRMx statements.
There are some options for the MAILCOMB keyword but I recommend that you use MAILCOMB=GROUPID. This option requires the general ESFPARM parameter XEQGRPID=JOBID to be set (requires a WARM start to implement).
From the documentation:
"MAILCOMB=FILENAME/GROUPID/USERID -- Sends an email with all queued files as attachments that have same the FILENAME, GROUPID or file creator’s USERID and have same TO=, CC= and BCC= email parameters. If XEQGRPID=JOBID and MAILCOMB=GROUPID are specified, all files created by a batch job with the same TO=, CC= and BCC= email parameters, are sent as one email with multiple file attachments."
DRIVPRM3='SUBJECT=&FNM - MAIL SENT BY &UID AS PDF ATTACHMENT',