Malicious PDF — malware analysis report

Static analysis result for SHA-256 78284f7fb6c52d9a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 19:39:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-16
MD5: e345544f821b7a292196d13d6edfeac1 SHA-1: 3abf00c11b4eeeeeb57b63dec2dbb3285fdbc328 SHA-256: 78284f7fb6c52d9a8c7b4d3c691316744fecd8b9889e07fcdf4471fc259377dd
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/479516143/minecraft-ps3-free-download-game-hack In PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-vip-server-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-vip-server-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-and-obc-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-free-credit_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-hack-without-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/no-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/www-roblox-com-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-script-roblox-tuto_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-gainer_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-accounts-with-bunnle-gum-sim-pets_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-robux-with-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-accounts-2021-with-robux-bugmenot_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_off0000328b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328B 21812 bytes
SHA-256: c1d0a08c769edf1c9c42ca9121cac12ec4b4c8a9b45817e64f43ecbde5e05c7a
font_01_sfnt_off00006288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6288 18904 bytes
SHA-256: 1ff22f039942d0da4b5f5b0c58eeeabae74443a41c427605d95e99f5cf2dd39a

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