Malicious PDF — malware analysis report

Static analysis result for SHA-256 c653dc058425be98…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 21:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 653b3fd68425a5fb7b06bf000730d2f4 SHA-1: 35a8b32926aaf08556bc91db956b70f1bacae78a SHA-256: c653dc058425be98b5b053bb36d65c3f8f6acb90d6a6884aacfc4dfec155a16d
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/coin-master-hack-apk-link-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-roblox-games-with-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-codes-2021-november_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/ilenders-roblox-youtube-hacker_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cheat-coded-roblox-minning_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/wurst-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-retail-tycoon-hack-no-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-in-roblox-on-ios_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-free-robux-script_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-unlimited-spin-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacking-apps-for-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_off00003390.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3390 23012 bytes
SHA-256: c95d0ce183331f444a63bc83868a96f1da46a748fe04b29fa46d1b4abcfb8d0d
font_01_sfnt_off00006732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6732 18180 bytes
SHA-256: 5b637a8a036eab97bffff91a515cae84fc40b6bddd589e778cc2e69a12b03167

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