Malicious PDF — malware analysis report

Static analysis result for SHA-256 99fdc0de0d1e33a2…

MALICIOUS

PDF

46.0 KB Created: 2021-05-14 05:00:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 98b44aece306041886b81a62239afe2d SHA-1: da02cb883d483a07d77efd15f2a8343119b4b472 SHA-256: 99fdc0de0d1e33a288e897a7c09c72ed5750a7de7437c1418e00e3a6cfe38ea7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free Robux' and game hacks. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/free-robux-no-human-verification-generator-game-hack In PDF document text
    • http://lawpatron.ru/images/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-100-robux_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/minecraft-thumbnail-maker-free_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/coinmaster-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC7 25676 bytes
SHA-256: 1505583815798e02c9b01334db1decdbf0ce88a5f67c91f20cd1fcb3eb0f26ab
font_01_sfnt_off00008301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8301 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FA9 18860 bytes
SHA-256: d7f1bf4664d5c073c741d68610eb5dcf28a8fd63084b2bf56aee4ef09f8af4a0

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