Malicious PDF — malware analysis report

Static analysis result for SHA-256 772ea350df97b2f5…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 22:38:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bc8c05cff317a6f7073e45484f3e8f85 SHA-1: e38f1ac95d76035d0e6880598b06fb05e0201e4f SHA-256: 772ea350df97b2f565c9a9c3cc0c5c06f74dbbc5fc49aac5fc69238761211d49
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users with promises of game hacks and free spins. The primary malicious link, http://netcdn.tw/app/406889139/free-spin-link-for-coin-master-game-game-hack, is designed to lead users to potentially harmful content. The document's structure and embedded URLs suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/free-spin-link-for-coin-master-game-game-hack In PDF document text
    • http://fishboat.hr/files/admin-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/best-free-roblox-exploit-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-hack-free-stuff-in-catalog-in-roblox_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-robux-master_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • http://fishboat.hr/files/royal-high-school-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/promocode-hack-for-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/dragon-ball-super-2-hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/hacks-to-get-free-robux_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_off00002de3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DE3 22904 bytes
SHA-256: 8828ca2aaffb3b90f00b72062fe7a8f92c466b7d4fc7e5e82f1d2bf6c3ca3687
font_01_sfnt_off00006114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6114 18604 bytes
SHA-256: f19d54f8b55e9054799c5fe3eb3858f8baa86cd1dd79e15d2a28d3659dcc94a2

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