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Malicious package

pdfjs-dist-v5npm

Malicious code in pdfjs-dist-v5 (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-1216
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall pdfjs-dist-v5

What this malware does

The package pdfjs-dist-v5 was found to contain malicious code.

The OpenSSF Package Analysis project identified 'pdfjs-dist-v5' @ 100.25.0 (npm) as malicious.

It is considered malicious because:

  • The package communicates with a domain associated with malicious activity.

  • The package executes one or more commands associated with malicious behavior.

Malicious versions

1 flagged
100.25.0

Indicators of compromise (SHA-256)

ea3eea654406297d9c58cb235af1e0ff5095edde635d85444f41f9189cd2e88f
e5827ccd19d073818da31059d76a725b171d1fc793a4f2591ed0118a35b46c35

Detection & response playbook

Malicious package
  1. Find it

    Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for pdfjs-dist-v5 (version 100.25.0). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging pdfjs-dist-v5 across your stack and pipelines.

  2. If you installed it — respond

    Remove pdfjs-dist-v5 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.

  3. Did it already run?

    If pdfjs-dist-v5 was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

  4. How O3 protects you

    O3 blocks pdfjs-dist-v5 before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. pdfjs-dist-v5 on npm has been identified as a malicious package (version 100.25.0 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Credits

  • Amazon Inspector · finder
  • OpenSSF: Package Analysis · finder

Detect & block this

O3 blocks pdfjs-dist-v5-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.

pdfjs-dist-v5 (npm) malicious package — MAL-2026-1216 | O3 Security