Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cfa93f5851e3c2f…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 08:53:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 96797e78b8f99b016500328de4f21915 SHA-1: 137c832e7aba3d9691f4388e2384970247c96a13 SHA-256: 3cfa93f5851e3c2fab28734168103af3afb0432f8fffa8b7fbc56171e05b86fe
160 Risk Score

Malware Insights

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

The ML classifier strongly indicated maliciousness, and the document body contains numerous URLs related to game hacks and cheats, suggesting a lure for users to download potentially harmful files. The presence of a download button heuristic further supports this, indicating the document is designed to trick users into clicking links that likely lead to malware or exploit kits.

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-cheat-thumbnail-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-csgo-on-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/bux-gg-robux-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-roblox-games-on-pc_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hack-adopt-me-roblox-download-script_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-admin-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/hacks-injector-roblox-laxify_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/freespins-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-roblox-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/unlimited-robux_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
font_00_sfnt_off00002f67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F67 22096 bytes
SHA-256: 3e8362a0146c40c2806079d27dc71fc8dde5cbac4b77af14f993772eea8b8b6d
font_01_sfnt_off00006056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6056 19276 bytes
SHA-256: 407d31deaaf200ce6fe4bce569ea1cb669d5b2dc2fe33c0eacb9c7f06f4e9164

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