Help removing protection from a PDF file.

steve-kon · 03-13-2024, 07:07 AM

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?

Foozle · 03-13-2024, 08:44 PM

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.

DNSB · 03-15-2024, 10:26 PM

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.

03-13-2024, 07:07 AM	#1
steve-kon Junior Member Posts: 8 Karma: 10 Join Date: Sep 2016 Device: Kindle Paperwhite	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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03-13-2024, 08:44 PM	#2
Foozle Connoisseur Posts: 61 Karma: 221034 Join Date: May 2021 Device: None	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.

03-15-2024, 10:26 PM	#3
DNSB Bibliophagist Posts: 40,573 Karma: 157444380 Join Date: Jul 2010 Location: Vancouver Device: Kobo Sage, Libra Colour, Lenovo M8 FHD, Paperwhite 4, Tolino epos	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.