Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada236f6fc5226aa…

MALICIOUS

PDF

33.7 KB Created: 2021-07-05 18:57:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ee7f4810f6d4a97973ba145cbcac53e2 SHA-1: be51256ef9c7896d33676d01c49c9bef738f6dcc SHA-256: ada236f6fc5226aaf050580cd49f8c7db5ec0bcd9c506e1189483c2056d6cced
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector infrastructure, specifically advertising 'Coin Master Hack Apk No Survey'. The primary malicious URL identified is http://netcdn.tw/app/406889139/coin-master-hack-apk-no-survey-game-hack. This indicates a social engineering lure designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

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.tw/app/406889139/coin-master-hack-apk-no-survey-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-2021-pc_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/medieval-hood-of-mystery-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-account-hacking-device_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-cookie-editor-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/welcome-to-roblox-building-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/2021-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-game-free-download_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_off00002d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8B 22480 bytes
SHA-256: 7d2f5394b54f9857fec8934eded60d4057bfc3792774cd35bfc5dbeb41649530
font_01_sfnt_off00005faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAA 18612 bytes
SHA-256: ea471364580b19b0a285475b4c0f13c806daaecf8552f4a25a80e6b014191c7c

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