Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8cd8a6fed9e334…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 12:56:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee5ef9db9bb1b693afcc13fd553662fb SHA-1: 874d989ec5620d683e3b25d5d4ac89feaae5f473 SHA-256: 7b8cd8a6fed9e334d7a3d564ff1d8c941d771ea6a4e37ca02c8646862643f99a
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 0.9980

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/free-coins-for-flip-master-online-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-1-million-robux-new_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-cheat-in-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-robux-without-using-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/tiktok-free-fans-2021_GM835599320.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-non-virus-recorder-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-free-400-spin-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hacker-egg-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-free-cape_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/gg-hack-client-roblox_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_off0000334b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x334B 22968 bytes
SHA-256: 9e793032ba81e8dd1b6c1fbff8f19dfd962297b113764cd6b8fe388ab275c57f
font_01_sfnt_off000066af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AF 18248 bytes
SHA-256: 8cfa59634457458d339bb1e8bd2afefc03424978bac6d50b318448ff975bd272

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