The file itself is not malicious, but non-malicious legal files can be abused to execute malware. I doubt if this file in C: root location could be leftover after some legal installation. Thre are two very probable possibilities:
- You intentionally/accidentally downloaded this file to this location for some reason.
- The file was dropped there by a suspicious (or malicious ) process.
If there are no other signs of a possible infection then there is no need to worry. You can look if there are some other PE files (DLLs, etc.) in the root C: location (the files can be hidden when using default Explorer settings).