Malicious PDF — malware analysis report

Static analysis result for SHA-256 479e5cc27fc2ec23…

MALICIOUS

PDF

42.0 KB Created: 2021-05-12 21:04:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c9105d4cd004218c549964ba94b4e1be SHA-1: d6d3419a955d28eb7ff1bdcacda7fbfd3852c8a2 SHA-256: 479e5cc27fc2ec23ccca129c5fdadf882ab011ee1c86a64f3ed743267e0b8f77
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/431946152/free-roblox-gfx-game-hack PDF link annotation
    • https://library.univthamrinaka.com/repository/coin-master-free-spin-and-coin-link-app_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/coin-master-hack-xyz-2021_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.univthamrinaka.com/repository/minecraft-life-hacks_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
font_00_sfnt_off00004c02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C02 24156 bytes
SHA-256: 202998014ec93011b374c9a8cc65e4a780c5352d78df97911cebe59456afd107
font_01_sfnt_off000082f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F3 17948 bytes
SHA-256: edf37cea4d9572b79aff99b5f3e3e51e81091579a2693570fa47b81a4934fab1

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