The log file alone is actually useless - we need the file itself to be able to add the detection.
The preferred way for sumbitting samples is e-mail (or sending from chest).
As I've already noticed several times - uploading the files to FTP, without additional contact, is not a good idea. The FTP is not monitored - so unless we are expecting some files, we won't really see them. Besides, finding a folder of randomly-names files on FTP doesn't really say much about them. If we detect it - is it a false positive or something that we added recently? If not - is it a false positive that was already fixed? Is it a virus sample? Is it just some random file some warez guys tried to upload to the FTP?
So, please, don't upload the files to the ftp unless asked to do so (or unless it's arranged in advance).