Malicious PDF — malware analysis report

Static analysis result for SHA-256 191d275a13bef25d…

MALICIOUS

PDF

35.2 KB Created: 2021-07-03 13:34:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 2c72bf2073c957320316b39fc18df3d5 SHA-1: 036c3ff2cef26a865e1b80fe02e338b86ed2ff99 SHA-256: 191d275a13bef25d5d5183107889c2f5484364044b38712001d665768d1bab5a
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/free-spin-hack-coin-master-2021-game-hack In PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-hack-online-download_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/robux-download_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/promocodes-roblox-free_GM431946152.pdfIn PDF document text
    • https://elma.mtsn8jkt.net/__statics/gudangsoal/files/mcpe-master-coin-hack-apk_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_off0000327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327D 22852 bytes
SHA-256: c6f03ab0c063c909776d143cc2aedb9fb9067238a72aa2554538069fdc278764
font_01_sfnt_off00006571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6571 18748 bytes
SHA-256: 7df8ab728cdded3f8099f37aff2fc644c0b56c156b14cd18fe44a93e03dbf9eb

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