Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b24b68e6786fdd…

MALICIOUS

PDF

46.0 KB Created: 2021-06-03 07:02:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-28
MD5: 03d4178eab464fd3ad9381e8579bf26b SHA-1: 0f7324fce0db5ffa62bd2d47a08499a3df216db6 SHA-256: 72b24b68e6786fdd81ab3b3e273f7540ddaacd7f1171e6ed31853f76f0ae22b9
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/how-to-get-free-roebucks-without-verification-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/pokemon-go-font-free-download_GM1094591345.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/blox-pink-robux-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-generator-without-human-verification_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_off00005426.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5426 25356 bytes
SHA-256: e96fd8b1e5984ca596c558715430b7983c8e74c53af0cfbbf6c0cee3b10ae662
font_01_sfnt_off00008efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFA 19088 bytes
SHA-256: 76bef895ccedca0d7e127244f2800d03548f0f97fc145608aee0aac4223f94a8

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