While there is no formal "paper" by this exact title, the file's naming convention—using a hexadecimal-style or alphanumeric string—is common for:
: Extracted files may contain executables ( .exe ) or scripts that can execute malware once unpacked. 12b12c.rar
: Unlike ZIP files, RAR can use solid archiving , where multiple files are treated as a single continuous data stream for better compression. While there is no formal "paper" by this