Compressed archives are a common way to hide viruses or "trojans."
If you can provide more details, I can give you a better answer. For example: Where did you or file? g., Harvard Business Review , Forbes , Entrepreneur )? business_development_magazine-8-2-4x.part3.rar
Be cautious when downloading .rar files from unknown sources, especially those with generic names like "business development magazine." Compressed archives are a common way to hide
Always scan files with updated antivirus software before attempting to extract them. Harvard Business Review
This indicates it is the third piece of a larger set. You cannot open or "review" this file without having Part 1, Part 2, and any subsequent parts in the same folder.
This is a compressed archive. It is often used to package many files together to reduce their size.