Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7b72644f5a0f1c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 18:53:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: b09fadd0755c306d0acb271f77c8e8db SHA-1: da18455949e6a4ccdc2007a714c722684fad60cb SHA-256: cd7b72644f5a0f1c0bccc96bf81777863907aa0240b5e8eeb02f265941db1593
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-daily-free-spins-blogspot-game-hack In PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-how-to-give-self-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-account-hack-app_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/noob-outfit-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-code-de-triche-gratuit-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-no-scams-no-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-codes-for-roblox-toys_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-cheats-unkwown-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/robux-hack-no-download-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/rise-of-nation-money-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/cheat-engine-roblox-2021-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/test-drive-evolution-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/doanting-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-cheat-codes-n-text_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-how-to-get-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-the-legendary-swords-rpg-cheats_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/generate-bots-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-no-verification-needed_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
font_00_sfnt_off00002e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E40 22360 bytes
SHA-256: 85262c353c941461152573217907acc94fc80dbffc9098b45e82a575c8be200d
font_01_sfnt_off0000603e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 18812 bytes
SHA-256: 754165e748b1939f240fb960abb57fbe544f87d1813c38e81129662f3dc27bc1

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