Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f307b4ec441b79…

MALICIOUS

PDF

44.1 KB Created: 2021-06-08 02:09:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1510f67aedde68750d1bc0869a47c622 SHA-1: c50dd1d58f78624a0d16f4f52fd5f9e955a4557f SHA-256: b9f307b4ec441b79c98cec2f5368ae591f334bda871a0ee08d3d8049cfc56f4a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as "free generators" for popular games. The document body and embedded URLs strongly suggest a phishing or scam attempt, likely to lead users to further malicious content or downloads. No scripts were extracted, but the presence of multiple malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-real-generator-game-hack In PDF document text
    • http://shiny-nn.ru/images/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/minecraft-pe-apk_GM479516143.pdfIn PDF document text
    • http://shiny-nn.ru/images/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://shiny-nn.ru/images/robloxhacks_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://shiny-nn.ru/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/roblox-money-cheat-codes-rocitizens_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://shiny-nn.ru/images/pokemon-go-free-joystick-android_GM1094591345.pdfIn PDF document text
    • http://shiny-nn.ru/images/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/how-to-keep-roblox-from-lagging-when-hacking_GM431946152.pdfIn PDF document text
    • http://shiny-nn.ru/images/get-robux-for-free-2021_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
stream_004_off00004ff1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF1 24664 bytes
SHA-256: 2ad0ef104ef27a522ecb0006669d97ad967b786a28f3d03986fd0889d5e3c676
font_01_sfnt_off00008928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8928 18420 bytes
SHA-256: 8f2118a378ad717fde7d42727426fdf84f9b69d51eccca40d357d5d183ff8b1f

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