Extract metadata from PDF in Linux in a matter of minutes

Aug 6th, 2022
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How to Extract metadata from PDF in Linux

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The video tutorial discusses how to extract metadata from different types of files and explains that metadata describes specific data. It highlights the importance of metadata in reconnaissance and mentions that it can provide useful information. The tool used for extracting metadata is called Exit Tool, available on GitHub, and the video provides the repository link for access.

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The best way to do that on Linux is using the exiftool command line program. It is an open source program licensed under the GPL 3 license, and exists in most Linux distributions repositories by default. For other Linux distributions, just search for exiftool in your distributions repositories to find the package.
Select all the text from your PDF by pressing Ctrl-A, including the hidden words, and use Ctrl-C to copy the text. Paste the text into an open Word document by pressing Ctrl-V. This will transfer all of the text in your PDF document, including hidden text that has been revealed, to a new document in Word.
You need to use the pdfinfo command to see information from a Unix or Linux CLI. This command prints the contents of the Info dictionary (plus some other useful information) from a Portable Document Format (PDF) file on screen. By default, pdfinfo command may not be installed on your system.
Option 1 : Exiftool with qpdf Remove metadata with exiftool : exiftool -all= some.pdf. Then remove ununsed objects with qpdf : qpdf --linearize some.pdf - some.cleaned.pdf.
Once you have access to docHub Pro, follow the steps below: Run docHub as an Administrator. When the program loads, go to File and select Properties. A window will appear. This will display the PDFs metadata. Choose to remove it, and then click OK.
Choose File Properties, click the Description tab, and then click Additional Metadata. Select Advanced from the list on the left. Save the document metadata, and then click OK: To save the metadata to an external file, click Save and name the file.
PDF files retain some basic file description metadata, such as author, file name, and date, which can be minimized if the proper conversion settings are used (see page 31).
PDF documents created in Acrobat 5.0 or later contain document metadata in XML format. Metadata includes information about the document and its contents, such as the authors name, keywords, and copyright information, that can be used by search utilities.

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