Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf6c8ad244a590b3…

MALICIOUS

PDF

33.5 KB Created: 2021-06-20 10:44:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 874c53a492036ad1cccc857a7c72f7bb SHA-1: 94ae9cd538b67f705f603bc162c248097de673e5 SHA-256: cf6c8ad244a590b30e828aa950f8e92a6bc20716d525143feeb46b02e6e1cba3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically advertising free game hacks and currency generators. The document body and embedded URLs strongly suggest a lure to phishing or scam websites. While no scripts were explicitly extracted, the nature of the links and the heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

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.co/app/431946152/roblox-code-free-game-hack In PDF document text
    • http://medinup.pt/images/top-10-free-robux-sites-that-actually-worked_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/mad-city-cheat-roblox-kill-all_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-roblox-robux-codes-no-survey_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/how-to-get-free-robux-pastebin-2021-javascript_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/hacks-for-no-scope-sniping-roblox_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-reward-sites_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://medinup.pt/images/how-to-have-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://medinup.pt/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/gift-card-hot-generator-hack-robux-codes-hot_GM431946152.pdfIn PDF document text
    • http://medinup.pt/images/coin-master-link_GM406889139.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_off00002d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D83 22024 bytes
SHA-256: aacb36b62e4b942e35a8f298782b3351f59c08f3fb5162b71b8ab7d6fe71305a
font_01_sfnt_off00005e50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E50 18824 bytes
SHA-256: 9c066033e373ce5e6744455da870664f7159aee2d12877887c6e7a8478095695

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