Malicious PDF — malware analysis report

Static analysis result for SHA-256 291d2ebb06b30494…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 01:43:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: edc20c2e3114938ee1c36261a748f031 SHA-1: b2b981ca1e766a5900b73d252987de67a0433925 SHA-256: 291d2ebb06b304948a4246f00d3b4d42de5e5a8ce84f8eba4217f134be5f4d6b
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 0.9865

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 https://netcdn.online/app/406889139/coin-master-spin-link-free-download-game-hack PDF link annotation
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/pubg-500-uc-price_GM1330123889.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-youtube-tiktok_GM835599320.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/pubg-uc-free-redeem-code_GM1330123889.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.pps.uin-alauddin.ac.id/repository/hacker-minecraft-song_GM479516143.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_004_off000050b0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B0 26188 bytes
SHA-256: 25c54855763123e2351101722f5d2411733a0fab98562dd735d866b083703890
font_01_sfnt_off00008a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A83 18636 bytes
SHA-256: 46c4ce7f3a504cb683a806d0c214b35b64d495ff19462287147198321f47e009

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