Malicious PDF — malware analysis report

Static analysis result for SHA-256 941f71d83c82df9e…

MALICIOUS

PDF

53.3 KB Created: 2021-06-08 22:40:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-12
MD5: c30d020ae36c2aeee980578204d0ad74 SHA-1: 157f6434dabc8821f4a96a93ddd9e1c1ada44115 SHA-256: 941f71d83c82df9eeecfbad4d56a680772c22527308863a1050e806eeff38888
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9588

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.tw/app/431946152/roblox-game-pass-hack-2021-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/40-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/master-coins-free_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-report-being-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-in-arsenal_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-admin-panel-roblox-pastebin_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hack-lost-world-2021-com_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AF 25556 bytes
SHA-256: 575668b896eabec81325ec9d7b41698458c24a8e652d165131b498dfa36966a0
font_01_sfnt_off00008d3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D3A 9508 bytes
SHA-256: bb0c4ad519d085bd67abfa702a9d89cce3f2d85dcfed9b2c9b0708a8154bed22
font_02_sfnt_off0000abee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABEE 18996 bytes
SHA-256: 96b566d228254c1df40d6b8573c280c9235068b53b8b1c421434a8eb43bde11f

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