One suggestion is that you practice using the "Code" tag and the Preview function. Rather than posting info that becomes nearly un-readable, the Code tag makes thing quite readable and preserves alignment. You can see how your post will appear to the forum by using Preview. When you like the way your post appears, Submit. Look at your data above.
You mention "after conversion" - i see no need for any conversion so far.
is the hex field pic 9(8) comp. or pic 9(4) comp. ?
It could be either or neither. . .
From the data alone, there is no way to know for sure how the fields are defined. There is code somewhere that created the file and that code should contain the proper definitions for the fields. The 4 bytes could be a 3-byte packed-decimal field (comp-3) followed by some hex byte. It cound be 2 9(4) comp fields or 2 s9(4) comp fields or a combination.