Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa81df20e94bee5e…

MALICIOUS

PDF

34.9 KB Created: 2021-06-21 11:53:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-06
MD5: 96d6b45d5c3336adeb211f1327c7a8aa SHA-1: 88636ee60a480bbc59aa77a0fb2bd605e9bebac7 SHA-256: aa81df20e94bee5e1ea2d83cc847ea258dafda6da27f3bccc987d2d9b08285a1
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/406889139/coin-master-coins-free-game-hack In PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-co_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-2021-apk_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hackcom-xyz_GM406889139.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://www.st-leonards-stafford.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-templates_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_002_off00003232.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3232 23224 bytes
SHA-256: 72a8f114a7e805149a4e030097cdb646d510dbdbb6504ac8b3d2016639c66f0a
font_01_sfnt_off000066aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AA 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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