Malicious PDF — malware analysis report

Static analysis result for SHA-256 79314f0efb1107a5…

MALICIOUS

PDF

43.7 KB Created: 2021-05-13 07:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-15
MD5: 366ebdfafda9eef903040bc0cc81abb6 SHA-1: 8c1a2ff2bdab63941027a3a1772a54be6ff4b615 SHA-256: 79314f0efb1107a58c9f00414f6a9dc4eef4438f7ce30f7cac2778a2f0071664
160 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/free-spins-coin-master-twitter-game-hack In PDF document text
    • https://www.bmta.co.uk/images/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/roblox-com-free-play_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/www-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/what-do-roblox-points-do_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/how-to-get-minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://www.bmta.co.uk/images/free-robux-com-roblox_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_off0000481d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x481D 24228 bytes
SHA-256: 626a814df471563f6e422ba25c07991ef79854ec13f39cca9c72ef770bcf99d7
font_01_sfnt_off00007f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F38 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000088ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EA 18052 bytes
SHA-256: 5c5bde080003b018f52b29448b55f3777b7529d6df28947afda157fb7b185cd7

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