Galaxy S8 is not updating

[SamiRobo]

my Galaxy S8 (SM-G9500) Chinese Version is running at Android 7.0 Nougat and I'm unable to update. it says latest update is already installed. I'm from Pakistan. what should I do?
I had also tried via odin but it fails. (threads succeed 0 / fails 1). I had downloaded firmware from sammobile G9500ZCS6DTJ1 and CSC G9500CHC6DTJ1

fail log:
<ID:0/007> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/007> Odin engine v(ID:3.1203)..
<ID:0/007> File analysis..
<ID:0/007> skip file list for home binary
<ID:0/007> abl.elf.lz4
<ID:0/007> bksecapp.mbn.lz4
<ID:0/007> xbl.elf.lz4
<ID:0/007> tz.mbn.lz4
<ID:0/007> hyp.mbn.lz4
<ID:0/007> devcfg.mbn.lz4
<ID:0/007> pmic.elf.lz4
<ID:0/007> rpm.mbn.lz4
<ID:0/007> cmnlib.mbn.lz4
<ID:0/007> cmnlib64.mbn.lz4
<ID:0/007> keymaster.mbn.lz4
<ID:0/007> apdp.mbn.lz4
<ID:0/007> msadp.mbn.lz4
<ID:0/007> sec.dat.lz4
<ID:0/007> NON-HLOS.bin.lz4
<ID:0/007> storsec.mbn.lz4
<ID:0/007> boot.img.lz4
<ID:0/007> recovery.img.lz4
<ID:0/007> system.img.ext4.lz4
<ID:0/007> persist.img.ext4.lz4
<ID:0/007> userdata.img.ext4.lz4
<ID:0/007> modem.bin.lz4
<ID:0/007> adspso.bin.lz4
<ID:0/007> cache.img.ext4.lz4
<ID:0/007> Home Binary Download
<ID:0/007> SetupConnection..
<ID:0/007> Initialzation..
<ID:0/007> FAIL! SHA256 is invalid
<OSM> All threads completed. (succeed 0 / failed 1)