Malicious PDF — malware analysis report

Static analysis result for SHA-256 47841909b63c5b31…

MALICIOUS

PDF

44.8 KB Created: 2021-05-12 19:36:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-20
MD5: a4ef527e57a525d7ce4a7504232ba0fa SHA-1: 29399595298f8550d9d25321febb5c399f46c945 SHA-256: 47841909b63c5b318106f846ac26f0255a194efa7e86bb16b83dd9a68a70aee1
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/479516143/best-free-minecraft-server-hosting-game-hack In PDF document text
    • https://tckontrola.hr/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/coin-master-hack-no-root_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/unlimited-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/coin-master-hack-spins-2021_GM406889139.pdfIn PDF document text
    • http://tckontrola.hr/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/apps-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://tckontrola.hr/files/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tckontrola.hr/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://tckontrola.hr/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://tckontrola.hr/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ad9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD9 24848 bytes
SHA-256: d5b1d78725918b06fd0a94b6de5351974776340c7b0ac62ec152ea69f420f1dc
font_01_sfnt_off000082b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82B0 2856 bytes
SHA-256: 8c5d9bcb386d88c7f99323d8d482e46ea21dea038a5b842744dd5d39b26b2c44
font_02_sfnt_off00008c87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C87 18328 bytes
SHA-256: 0b2d28431e5234c57104fb234e5f183f246f5a4819408a3d571d7ab08b18c1e5

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