Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc66db1f4cbee28…

MALICIOUS

PDF

42.5 KB Created: 2021-05-15 15:34:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f142aefe632462d2b2d73cf4933fbdd7 SHA-1: 092690a3293a8045e4947448277530554af3e3c4 SHA-256: 3bc66db1f4cbee283bb6192c7de4bb7c8a3470bb9639d4c3cf9df88385fec75f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for popular games. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/download-apps-for-robux-game-hack In PDF document text
    • http://uristdona.ru/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/free-minecraft-account-list_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-android_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/hack-client_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/minecraft-free-apk-java-edition_GM479516143.pdfIn PDF document text
    • http://uristdona.ru/images/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • http://uristdona.ru/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://uristdona.ru/images/links-for-free-spins-for-coin-master_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_off00004934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4934 24480 bytes
SHA-256: bb95d1d1d7f4ac1298da461f69947220d8b61d4ac432073f8da0dfbfb891551b
font_01_sfnt_off00008168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8168 18996 bytes
SHA-256: ea235c61f7ee6ff97cb8e2e4b8381115f9ce59fc272e8f2939e83a9622de1179

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