The specific number "39" might even imply a pattern. If a hacker finds finances_39.xls , they might try to access finances_40.xls or finances_38.xls in the same directory, mapping out an entire organization's financial history.
On a macro level, organizations like the World Bank publish public finance datasets to ensure transparency in how governments manage revenue and expenditure. These indices track critical indicators such as: Excel file - World Bank Index.of.finances.xls.39
Imagine finding an .xls file with the following columns: Name , SSN , Credit Card Number , Expiration Date , CVV . Because of misconfigured home routers or old NAS (Network Attached Storage) devices, this happens more often than you think. Cybercriminals actively scrape the web for these strings. The specific number "39" might even imply a pattern