The utterance,

$ perl -MPDF::API2 -MData::Dumper -e'my $pdf = PDF::API2->open("fw9.pd
+f"); my $res = PDF::API2::Resource->new_api($pdf); print Dumper($res)
+'
[download]

produces, among much else, the string:

'This form has document rights applied to it.  These rights allow anyo
+ne completing this form, with the free Adobe Reader, to save their fi
+lled-in form locally.'
[download]

I have no idea whether that's really true.