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Old 03-13-2024, 06:07 AM   #1
steve-kon
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Help removing protection from a PDF file.

I have an app on my phone, ACK Comics. I downloaded few comics on it but they can't be viewed outside the app. It's downloaded in PDF format. Here's a link to the file,

https://drive.google.com/file/d/1aQ4...w?usp=drivesdk

How do I know the type of protection on the pdf and remove it?
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Old 03-13-2024, 07:44 PM   #2
Foozle
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If it's DRM protected, you can't. It may be strictly proprietary protection that can't be broken. If so, you would have to find a DRM-free version.
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Old 03-15-2024, 09:26 PM   #3
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It's is a proprietary encrypted file. A PDF file will have %PDF-1. as the first characters of the file which your comic does not have. It may have been born as a pdf but it has been mutated.
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