WebCapture
can automate PDF conversion submissions as well as allowing users to
specify website url and output filename as command line arguments.
The syntax is as follow:
webcapture.exe url http://www.yourwebsite.com/abc.html yourwebsite.png
While
the above takes care of specifying url of interest and output filename,
WebCapture will continue to prompt you for your email address to send
you generated PDF retrieval links; unless you setup a
webcapture.ini file in your system32 folder. e.g.
c:\windows\system32\webcapture.ini in the following format:
[settings]
usernameentry = John Doe
sendtoemail = john_doe@yourdomain.com
annotate = properties of John Doe

The "annotate" setting allows one to preset a string of text to be annotated on your output .png file.
Not only can you specify email, you can also specify "usernameentry"
which is used as the PDF "Author" in generated PDF document properties.