Malwares, Viruses and other threats can take the form of any application or file, so when in doubt always scan the files. IObit Cloud Scanner is a nice online service which allows you to scan files by uploading them. IOBit Cloud uses latest cloud computing technology and Heuristic Analyzing mechanic to analyze the behaviour of spyware, adware, trojans, keyloggers, bots, worms, hijackers and other security-related risks in a fully automated mode.
Just select the file and the service uploads it to server for scanning. Once uploaded, it is queued based on the requests. It analyses the file for all possible threats and then generates the report for the file.
Related: Scan Files Online with Virus Total
If you are looking for a desktop tool to scan from multiple anti virus engines, you can try JottiQ.