Malicious PDF — malware analysis report

Static analysis result for SHA-256 19125d289b5959d4…

MALICIOUS

PDF

44.0 KB Created: 2021-06-11 04:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-22
MD5: 6e768b4f2c2d80faabe4569fb9daf51f SHA-1: 5d337d362bcb71a795be4ea524ffb42e41bc851e SHA-256: 19125d289b5959d4c73cf87821478322de1150cf3b05442f949a17edea3d4829
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.tw/app/431946152/roblox-hack-through-walls-game-hack.
  • 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-hack-through-walls-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/nomnomnom1-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-roblox-accounts-easy_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-tool-v1-9-apk_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/get-free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coins-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-robux-event_GM431946152.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
stream_004_off00004ed8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ED8 24492 bytes
SHA-256: 20d92cd86f345f1514f5f925124fc64dc4cbdfbb7c0ecc6abcfebc5dbbbb3a66
font_01_sfnt_off00008737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8737 18976 bytes
SHA-256: c21ff879d372045554d469b66ee48dbd3bdfc68f37f70d8b19ca58e345c316c9

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