Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed8ed8f20db9f8f…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 22:58:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0b1c55ac83e4248250a5257597755b5b SHA-1: 8b94bcd7460ac2ec95edfbc7a3bf67233474d806 SHA-256: 0ed8ed8f20db9f8f69fb01b388cef25c19693b44246d3b6dda143a59ea2086aa
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, 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 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.tw/app/406889139/coin-master-free-spins-link-today-new-game-hack PDF link annotation
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/hack-matar-gente-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/earn-free-points-for-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-money-for-free-on-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/buy-delta-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/getting-robux-w-cheat-engin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-hack-app-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-hack-apk-download-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/actual-working-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/youtube-how-to-get-cheats-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/roblox-cheat-codes-for-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-get-robux-on-roblox-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib/repository/how-to-hack-roblox-accounts-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pt-yogyakarta.go.id/lib//repository/free-tiktok-that-you-dont-have-to-download_GM835599320.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_off000033a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33A9 22208 bytes
SHA-256: 60feabeaeca6d6617a048d5df741caa0c26bc187b8db6584f6812dd3882c2238
font_01_sfnt_off000064b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B0 18864 bytes
SHA-256: c2b00cda6ccae936c285d4a8f1a252405c0779bc4d7804dfd8560043eb77b64f

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