ARM Linux executable mysteriously runs on x86_64

I'm using the a Docker container (thewtex/cross-compiler-linux-armv7) to cross-compile a simple "Hello World" Linux user space C program on a Fedora 23 x86_64 system. The target system is a ARMv7 embedded system (in particular a Kobo Aura HD e-reader with stock firmware).

The source code of the program (hello_world.c) is as follows

#include <stdio.h>

int main(int argc, char *argv[]) {
    printf("Hello World!n");
    return 0;
}

I invoke the compiler using the following set of commands

docker run thewtex/cross-compiler-linux-armv7 > ./dockcross.sh
chmod +x dockcross.sh

For some reason the generated shell script is buggy, I manually have to replace /cross-compiler-base/cross-compiler-linux-armv7/ and /:build/:build:z/ in dockcross.sh. Now I run

./dockcross.sh arm-linux-gnueabihf-cc hello_world.c -static -o hello

file returns the following information about the resulting hello executable

hello: ELF 32-bit LSB executable, ARM, EABI5 version 1 (GNU/Linux), statically linked, for GNU/Linux 2.6.32, BuildID[sha1]=317a9ea164931f614b24e98dec743050e2d7f900, not stripped

Unexpectedly, I can execute the resulting executable on the host system:

andreas@andreas-pc:~/tmp/test$ uname -a && ./hello 
Linux andreas-pc 4.5.5-201.fc23.x86_64 #1 SMP Sat May 21 15:29:49 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
Hello World!

as well as on the target device

[root@(none) onboard]# uname -a && ./hello 
Linux (none) 2.6.35.3-850-gbc67621+ #1038 PREEMPT Thu Apr 25 15:48:22 CST 2013 armv7l GNU/Linux
Hello World!

Is there any explanation for this?