Malicious PDF — malware analysis report

Static analysis result for SHA-256 4455fe9ba30195f9…

MALICIOUS

PDF

49.4 KB Created: 2021-06-10 16:13:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-11
MD5: f74d013a63fd1df8e7d157a1c8eefeed SHA-1: d9d67a5ba5c142ca56cb630f8096e3cc9b36a941 SHA-256: 4455fe9ba30195f96db9a64bfc11a8f8fa8f83991aaae119dd99983a1c51819e
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/ghow-to-get-free-robux-on-computer-game-hack In PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-coin-master-card-free_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-spins-coin-master-links-app_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/pubg-uc-zing_GM1330123889.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-scam-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-manete-free-box_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-facebook-free-spins_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
stream_004_off000051be.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51BE 26316 bytes
SHA-256: 17ba519cdc91da84a57f0361a34faf68fd9f6dc7e5e13b09a23a72c3cc5f17cc
font_01_sfnt_off00008fb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FB8 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009cca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CCA 18884 bytes
SHA-256: f9f6f839cf26d77d33685b454b6916ab07e4b9529a86803df524054a10a2fb4d