Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e5b6df0a23c657…

MALICIOUS

PDF

41.0 KB Created: 2021-04-26 18:03:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1dbb8974f48ec4f0bb7235732346a5ad SHA-1: 534c24995496be387ecbc6f25d0d6fd5db0ac3c7 SHA-256: b9e5b6df0a23c657907cba9ca33fb4bcccfccffa4aedc8e3396ef96254f44bfd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/431946152/free-roblox-shirt-bot-discord-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-roblox-card-codes-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-free-limited-faces.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/hacks-de-pago-para-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-your-old-hacked-roblox-account-back.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-how-to-get-free-robux-youtube-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-royale-high-cheats-for-diamonds.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-do-you-get-free-robux-in-roblox-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/freerobuxvbucksexe.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-without-logging-in-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-admin-hack.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FB6 26544 bytes
SHA-256: 330c45c4b99679f9be1be9f6a92bafc03dc90694d28a2db36b38df8c29a2cf12
font_01_sfnt_off00007d44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D44 18680 bytes
SHA-256: d7c17a81432fbc7bf11b141ad02a0ce567161f0379f0e0003ad30bd41a0cddbe

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