Malicious PDF — malware analysis report

Static analysis result for SHA-256 9943b768e939d68b…

MALICIOUS

PDF

33.7 KB Created: 2021-07-07 23:41:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7995e766def9eba151ccd7df67ca5c21 SHA-1: f3a0fef6c01e49617081e27334da1ceaba17a359 SHA-256: 9943b768e939d68b356ad130c5442aea46d2ec1ee004e3601945d2c3a9a494be
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses an urgency-based lure. 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 0.9980

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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 http://netcdn.tw/app/479516143/how-to-get-free-skins-in-minecraft-game-hack PDF link annotation
    • http://librarystkippgribl.com//repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-windows-10-mod-menu_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pokemon-go-free-shiny_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/get-robux-now_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-ios-download-2021_GM406889139.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_off000030eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EB 21956 bytes
SHA-256: b607a2fc8abecd6cce1a4ad1836fcf9f5768241e6244e2536b8ee308cb3c13a5
font_01_sfnt_off000060ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60EE 18332 bytes
SHA-256: aae53986d5e040802ba5fac0bdf7ddb8e28dcfd27e7dab4d6fe2a7bdc2952b4d

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