Yes, you can. here is one thing you may need to pay attention -- protocol choice and a http server
You can use "file://" or "http:" as the url protocol to let webkit to load the viewer.html.
If you use "file:///", you may find the cross domain issue. (error message looks like "XMLHttpRequest cannot load file://mnt/sdcard/somewhere/cache/web/locale/locale.properties. Cross origin requests are only supported for HTTP."), and there will be the similar problem if you put the pdf files in some other places.
The resolution to this issue may be to revise the viewer.html to convert it as a single file.
If you use "http:" as the protocol, you may need a small http server in you Android device.
Good Luck