Interesting stuff in there with just a quick glance.
They don't even try to obfuscate it, they even gently give pirates all the information they need

.
Pretty careless IHMO.
Code:
.rodata:081C9BC3 public INTERNAL_PUBLISHER_KEY
.rodata:081C9BC3 INTERNAL_PUBLISHER_KEY db xxh, xxh, xxh, xxh, xxh, xxh,
.rodata:081C9BD3 public INTERNAL_READER_KEY
.rodata:081C9BD3 INTERNAL_READER_KEY db 72h, 38h, xxh, xxh, xxh, xxh, xxh, xxh, xxh, xx
People who have used drmmobi will recognize these stuff.