Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6490bfd31dbf7f…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 19:23:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 450b2756e5c9e388da16183e0e9e4229 SHA-1: 90699a8d8e549be9ea78ab60b9fbd7d13b0cf589 SHA-256: 1b6490bfd31dbf7f89b3fafbd2af36d93863ae73d8c60ca8716c3a3be46689b2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that lures the user with game hack promises. The primary URL, http://netcdn.tw/app/431946152/roblox-adopt-me-hack-game-hack, is identified as a redirector to potentially malicious content. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lead the user to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/roblox-adopt-me-hack-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-noclip-hack-wearedevs_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-vip-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/best-free-fps-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-diamonds-on-royale-high-school-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-me-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-robux-free-easy_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-a-free-gift-card-on-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/today-coin-master-spin-free_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_off00002e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E2D 22236 bytes
SHA-256: d50543b9a251c46b7eaa3802e9095848318785745ccba613f5e0036538641556
font_01_sfnt_off00005f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7F 19308 bytes
SHA-256: 1d6d529828a603e65e14b6285156acac3d11e3a25e7a00ad8dd7aee01cb73554

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