Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c96d88967dccf5c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 05:20:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: f9ca4b99e43fb6ea6a996906af5c9ff4 SHA-1: a998802b0f5eef1210f8f7706f09428ea8ea1765 SHA-256: 7c96d88967dccf5cee5d83c586bda26624e6403042dccc00dc5adfe8c3228d61
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/how-many-levels-does-coin-master-have-game-hack PDF link annotation
    • http://lib.uho.ac.id/library/repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-hack-fast-org_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-xray-hack_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-how-to-get-free-t-shirts_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/ac-market-coin-master-hack_GM406889139.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_off00002e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E91 22620 bytes
SHA-256: f86628b24dde6bac32993e8ddf1586ea7bef3585895bd99b2f45b199496dbe3a
font_01_sfnt_off000060fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FB 18532 bytes
SHA-256: 73519756161c219c9429bfa0cb2914b64f7e4f466f675339707cc65ed84bb154

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