Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c8719da7b23d67a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 20:03:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0f58f574c0b0f434e97856b9050db2ee SHA-1: 1a8c2ba147ee3c1e3f76356ee7f5aac40b25b4fc SHA-256: 7c8719da7b23d67a2d1fc62509b64f61738a83a50ebe0d42f2ba2f6cc71fb35f
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/479516143/minecraft-fly-hack-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library//repository/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/we-hack-com-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/try-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robux-gainer-free_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-printable-roblox-invitations_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-gold-cards-free-link_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-vermillion-free-level-7-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spins-ios-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/robuxab-top-free-robux_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
font_00_sfnt_off000031f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F4 22048 bytes
SHA-256: 11756e1aa988ae84c7f7c11a5d38352c024e5e73975553585d7f0b410ca80d6c
font_01_sfnt_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 18280 bytes
SHA-256: 56f87322d6175f5188b2f3e54b3290a6e5898c7bed8f3d8c577e55e984b17e01

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