Malicious PDF — malware analysis report

Static analysis result for SHA-256 43b2b3033bfe1664…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 21:36:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5c03b887118663341fc6a9e1cb9179ed SHA-1: b9b5c1ff825c632480fabbe2a18fc3cded4eca04 SHA-256: 43b2b3033bfe166448097160663b4e405c451e0d5a481d14f82e7eda5ebdfadc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacks and free generators, specifically mentioning 'Coin Master Link Today'. It embeds a URL that redirects to a suspicious domain, likely to host a malicious payload or phishing page. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-link-today-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-roblox-group-giving-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/cute-hacks-for-roblox-royal-hjigh_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-noclip-hack-download-ipad_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-jump-hack-bit-slicer_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-mobile_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_002_off000030a0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30A0 23012 bytes
SHA-256: 1ce0db54b240d3d54c7735bf9987113828e2bf41dc79a32ea3b00d4fd6dceb15
font_01_sfnt_off00006470.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6470 18356 bytes
SHA-256: a0a0724bc66754c09fd06c8492cc7e1865f42ab17c8ab237f13f9486378ddf6f

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