Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8437c3a3f7e45e…

MALICIOUS

PDF

43.1 KB Created: 2021-05-11 13:03:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-07
MD5: 849b5394fb25e0bdf56f9fee51c12795 SHA-1: d2360a215d1ef5f72721e21cc7b75b16e4f79478 SHA-256: aa8437c3a3f7e45e4adf764661c7c95227bfcf53487599010353b934a8c00c29
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/get-free-robux-com-game-hack In PDF document text
    • http://tckontrola.hr/files/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/free-minecraft-server-hosting-with-plugins_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/roblox40com-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-game_GM406889139.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_off00004932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4932 26972 bytes
SHA-256: 0010bc8a49594f52df306d6a3c7c470ddcb5bf85a34783f05be9212bc7361531
font_01_sfnt_off000085f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F7 18376 bytes
SHA-256: 2d8882c6a342abc4889e46f94bfee9f8cbf5538b2f5dc41d172000db9622f481

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