If you have some protected/licensed slides that require a non-open/compatible PDF reader (i.e. Locklizard) you can use this commands to bypass the block.

ecfuck.sh

#!/usr/bin/bash
#
# Author notdodo
#
#

###############################################################################
# SCENARIO ####################################################################
###############################################################################

# If you have some protected/licensed slides that require a non-open/compatible
# PDF reader (i.e. Locklizard) you can use this commands to bypass the block.
# The idea is to capture the screen of the Windows VM where the slides are
# displayed in an automated fashion.
# Setup: using two screens should be better since on the first one you can open
# and leave the Windows VM, on the other one open this guide and a terminal.

# Check requirements
if ! hash ffcast 2>/dev/null; then
  echo "Please install ffcast"
  exit -1
fi

if ! hash ffmpeg 2>/dev/null; then
  echo "Please install ffmpeg"
  exit -1
fi

if ! hash xdotool 2>/dev/null; then
  echo "Please install xdotool"
  exit -1
fi

# ffcast: select a portion of the screen where the protected slides are present,
# the command will create a video in the home directory (output.avi).
## Options: high quality and 1 frame per second
## To stop the recording press ctrl+c
alias screencast='ffcast -s % ffmpeg -y -f x11grab -show_region 1 -framerate 1 -video_size %s -i %D+%c -codec:v huffyuv -vf crop="iw-mod(iw\\,2):ih-mod(ih\\,2)" ~/output.avi'

# Once the recording is complete:
alias extract_frames='mkdir ~/frames/; ffmpeg ~/frames/slide%05d.png -i ~/output.avi'
# This command extracts all PNGs from the video creating a list of "slides" in the `frame` directory.
# To clean all duplicates execute in the `frame` directory:
alias clean_frames='md5sum * | sort | awk '"'"'BEGIN{lsthash = ""} $1 == lsthash {print $2} {lsthash=$1}'"'"' | xargs rm'

# Press the key Page_Down every 2 seconds
alias auto_press_pgdown='sleep 1; for i in {1..1000}; do xdotool key Page_Down; sleep 2; done'

###############################################################################
# FLOW ########################################################################
###############################################################################
#
# 1. Open the PDF file on the VM: set the reader to the correct zoom and in
# full screen (the page should be fully visible and readable, if necessary use
# a better/bigger screen; FullHD/2k at least).
#
# 2. Execute this script to set the new aliases
#
# 3. Run the `screencast` command and select the screen region where the slide
# is visible
#
# 4. In another terminal rerun this script and execute `auto_press_pgdown`
#
# 5. Quickly change the focus of the window to the WindowsVM  to allow the
# Linux host to send the keypress.
#
# 6. Wait until the PDF is scrolled to the end and then press Ctrl+c on both
# opened terminal (`screencast` and `auto_press_pgdown`)
#
# 7. `output.avi` should be in your home directory
#
# 8. Execute `extract_frames` to create the `frames` folder and get all frames
# from the AVI
#
# 9. Since it's possible that some frames are duplicated execute `clean_frames`
#
# 10. In `~/frames/` now you have all the single pages of the PDF.