Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b681079a4c03004…

MALICIOUS

PDF

41.9 KB Created: 2021-05-12 16:04:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-17
MD5: cf63394fd1733ee48b96809555f76164 SHA-1: fd211634da6db7bf8282ea9f625952a3dd719cc7 SHA-256: 2b681079a4c0300416661dfd487715044c5a7bd60a9bf6841a868f3a43c41a6b
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/mcpe-hack-client-game-hack In PDF document text
    • http://pesok-rk.ru/images/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-come_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-old-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/coin-master-ad_GM406889139.pdfIn PDF document text
    • http://pesok-rk.ru/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://pesok-rk.ru/images/how-to-get-free-robux-fast-and-easy_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
stream_003_off0000485c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485C 26252 bytes
SHA-256: 1b4fde74dc868c9991816dd54c71f4ea29b0d7f129e9b24659cf9280ab733608
font_01_sfnt_off00008261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8261 17988 bytes
SHA-256: 87e99989ab28f7107c4229d46f6cf183976b270a9adc21032b385c5b4f15e52f

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