Which versions of zrzpdfjs are malicious?

The following RubyGems versions of zrzpdfjs are flagged malicious: 0.0.1. Treat any of these as compromised.

How do I remediate zrzpdfjs if I installed it?

Remove zrzpdfjs from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.

I already installed zrzpdfjs — how do I know if it already compromised me?

If zrzpdfjs was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Is zrzpdfjs part of a known attack campaign?

Yes — zrzpdfjs is associated with the RLMA-2026-04421, RLUA-2026-10359 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find zrzpdfjs across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for zrzpdfjs (version 0.0.1).

Malicious package

zrzpdfjsRubyGems

Advisory published Jul 7, 2026Updated Sep 24, 2026

zrzpdfjs is a confirmed malicious RubyGems package (MAL-2026-9770) that executes malicious code on install (malicious version 0.0.1). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in zrzpdfjs (RubyGems)

MAL-2026-9770

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

gem uninstall zrzpdfjs

Malicious versions

1 flagged

0.0.1

Indicators of compromise (SHA-256)

e965bca5d660d9437a87c94f4d8bfb26b8ae7c77f65ed33ef966dc04d3adf5f3

ae0d7acc5089060044755fae9689715a1c5cb73fcd7f294ff77e59fa48d30974

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for zrzpdfjs (version 0.0.1).
If you installed it — respond
Remove zrzpdfjs from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If zrzpdfjs was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.

Frequently asked questions

No. zrzpdfjs on RubyGems has been identified as a malicious package (version 0.0.1 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-04421RLUA-2026-10359

References

github.com

Credits

ReversingLabs · finder

Detect & block this

O3 blocks zrzpdfjs-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.

Malware detection Runtime egress monitoring

Explore

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