Unknown data between `class_defs` and `data`

[Razican]

Seems that there is some unknown data between the class_defs section and the data section. For example, the test file has 76,792 bytes of unknown data. We should understand what this is and try to parse it.

[Razican]

Seems that some of the data can be correlated to some other data offsets that are left once the sequential read finishes, but still a lot to investigate, many bytes are unknown.