Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a21fc360f13f99d…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 09:12:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6966e74b7c75ad5186c6aef660884f6f SHA-1: 434aa60fe13884c928be09b7885c92542b6e5668 SHA-256: 0a21fc360f13f99d14eea07ac260329f386514e90c86ecef23f4c5682d325c7b
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/431946152/roblox-free-robux-hack-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-principal-on-roblox-high-school-2_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-simulator-script-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-free-robux-offers_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/client-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/bunny-ears-2021-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/pubg-uc-and-bc_GM1330123889.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/app-hack-roblox-pc_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-high-school-2-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/www-roblox-com-free-games-at-roblox-com_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-a-roblox-accoutnt_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-hack-generator_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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22332 bytes
SHA-256: a2a4b49e2808a2e00cc0b07a156d7c5c452a9c15d2e0879cdd5d7e825b647e9f
font_01_sfnt_off000060c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C9 18960 bytes
SHA-256: 4bbd4e0b11a4de08a120ed278073258e380cedc6aab10c61138cdabd5952661a

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