Q:
Can I get an armv7 only version of the library? This way I can directly use the PDFNet library for armv7 only, without having to do the same for our app project itself.
A:
You can extract an armv7 only version of libPDFNet.a with the following terminal command:
xcrun -sdk iphoneos lipo libPDFNet.a -extract armv7 -o libPDFNet-armv7only.a
Note that you will also have to use the linker flag -allow_sub_type_mismatches or you will probably get linker errors.