Document Steganography

A subject conceals data within a business document by using content, objects, fields, formatting, or internal structures that are not visible during ordinary viewing.

The carrier may be a word-processing document, spreadsheet, presentation, Portable Document Format file, or another document type routinely used by the organization. The document may open and display expected content while containing hidden text, files, archives, scripts, worksheets, comments, embedded objects, metadata, or other concealed material.

Methods may include white text on a white background, extremely small font sizes, content positioned outside the visible page, hidden spreadsheet rows or worksheets, concealed presentation objects, embedded files, unused form fields, custom metadata, document layers, or internal package relationships.