Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d223cd2f443ea0d…

MALICIOUS

PDF

33.8 KB Created: 2021-06-20 11:45:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d530f8abd1677eebc4365a77b8c4cbf7 SHA-1: e3ebaaff53d1bc773433d964a3af05e5c0e17210 SHA-256: 8d223cd2f443ea0d98a48e713ed583c69071987ce6ea147cdede9af70d314b3f
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.co/app/431946152/free-robux-hack-2021-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-accounts-2021-mac_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-with-out-human-ver_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-boy-hair_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-money-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-paest-bin_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/cheater-sur-roblox-nul_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/why-cant-i-buy-free-hats-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/speed-hack-assassin-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-exe_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_off00002e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E5C 21712 bytes
SHA-256: 3e33794e5641f1439a981eeffd1a9b774238e9e543aab5e5d8699d269c91bab6
font_01_sfnt_off00005e21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E21 19288 bytes
SHA-256: f0e75447e64b5aff6e0a409bd439ae7070421d1013f4950abf0614a44f9f6dfe

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