Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8da5f7628d60345…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 05:46:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6af55c4414052238756b43945c5e152d SHA-1: 9f19443eafbbf76093c4972eddf3722e396b0c6f SHA-256: d8da5f7628d6034511eddaba03500b300c6a62bdcb8837e79f941099eb7a165b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free spins' for popular games. The primary redirect URL is http://netcdn.tw/app/406889139/coin-master-free-spin-link-today-download-game-hack. This indicates a social engineering lure designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious redirectors and the lure content strongly suggest a phishing or scam campaign.

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-free-spin-link-today-download-game-hack In PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/roblox-hack-atravesar-paredes_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/moonactive-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/mobi-hack-robux-hack_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/red-boy-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://megapolgroup.com/ckeditor/ckfinder/userfiles/files/hack-roblox-exploit-omgexploit_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_off00003579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3579 22436 bytes
SHA-256: 9f937fea098578be86c7090bc318b2c5a686197795535e294671b19bc94b3c1e
font_01_sfnt_off00006747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6747 19104 bytes
SHA-256: 1895fc22eac210dcee8774f96ffcb0cbff56cbfdafdc0278c931d408205b68ac

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