Malicious PDF — malware analysis report

Static analysis result for SHA-256 521434398769883f…

MALICIOUS

PDF

32.7 KB Created: 2021-07-20 20:14:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7c97b0c7c0e460f854db9b7afe956a9b SHA-1: 0a403d4d430df5c4b77f85b9cb752ab8dffcd265 SHA-256: 521434398769883fbec71ed1bbe16186c3e8f4056bb4e6889bd794e1e7993a73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains embedded links and a visual download button, luring the user to external sites that likely host malicious content or further exploits. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The document body and embedded links suggest a scam related to obtaining free game items or software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/479516143/how-to-get-minecraft-windows-10-edition-for-free-game-hack In PDF document text
    • http://dieter-sauter.com/images/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-download-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://dieter-sauter.com/images/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://dieter-sauter.com/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://dieter-sauter.com/images/how-to-get-minecraft-for-free-on-pc_GM479516143.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_off00002ad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD7 22608 bytes
SHA-256: cb3817cc0165df9856b1cfb333826c472d49450fb66be857aa3c7f38640f85c2
font_01_sfnt_off00005d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D10 18524 bytes
SHA-256: 758265ab9626b01b7f82acdeb793963e34ce825989d987f26b8b838bd6c44d94

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