Malicious PDF — malware analysis report

Static analysis result for SHA-256 793f613431cdcf2c…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 12:29:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 15b2f31644596abe9c2d3183d3b3fb5d SHA-1: dd856a5320078093ef1915146d2b695289a6a61b SHA-256: 793f613431cdcf2cb1039697ba46c46443c8ba519882c5121cd1b92a5b7b8cb1
200 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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.tw/app/431946152/roblox-hack-in-2021-in-all-games-game-hack In PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/hack-coin-master-game-download_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/robux-premium_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/rbx-free-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/cm-spins_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-exe_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/create-app-like-tiktok-free_GM835599320.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/is-minecraft-bedrock-edition-free_GM479516143.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_004_off000053f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53F1 26924 bytes
SHA-256: c08677f25081bf2d9b5fa7799ad21aa2158e4d55e5b1d8c6c97e7c272ca00988
font_01_sfnt_off00009007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9007 18844 bytes
SHA-256: 3363d8ef0c24b14be4c5e006daa7dabb8e1e634f02b5cbaf510cbee146d68410

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