MAL-2026-13046 Malicious code in boxy-fixture-pendel (npm)

On require('boxy-fixture-pendel'), index.js loads support.js which asynchronously downloads a platform-specific binary from obfuscated destinations assembled at runtime via string-array.join('') — oob-worker.cf103-070.workers.dev and related Cloudflare Workers subdomains, with a DNS-TXT-record fallback channel that reassembles a base64-encoded binary from numbered TXT records under net.dl.wel1.ru. The fetched bytes are written to /tmp or %TEMP% under cover-story filenames (dotnet_diag.exe,.cache_), chmod'd 0755, and spawned detached via cp.spawn('/bin/sh', ['-c', filePath + ' &'], {detached: true}) or the Windows equivalent. There is no hash or signature verification, and the download destinations are unrelated to the package publisher. A second copy of the same dropper (split-concat hosts, /bin/sh -c spawn, chmod 0755, base64 buffer reassembly) is bundled in lib/telemetry.js under 'Analytics SDK' scaffolding; it is present in the tarball but not reached from index.js in this version. TTL caching and env-var opt-outs are included to reduce repeat triggering and aid evasion.