Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0db91b73e8e66ac…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 06:03:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 76221dd443ed4637608a1fb637948f87 SHA-1: 54828868d7e30a4451f95dd1eb1b03255e80a287 SHA-256: a0db91b73e8e66ac68e39576e49c7f6b1c2b6d2d9755d90f7a28cb8cfa595022
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/free-robux-hack-no-human-verification-game-hack PDF link annotation
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/cheat-roblox-wallhack_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-download-xbox-one_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/tiktok-free-login_GM835599320.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/synapse-hack-roblox-anti-ban_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-dungeon-quest-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-royale-high-cheats-for-diamonds-november-2021_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-person_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/hacks-para-roblox-counter-blox-roblox-offensive_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/como-hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/free-roblox-studio-ship-parts_GM431946152.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • https://ie.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-hack-promo-codes_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_off00003458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3458 22868 bytes
SHA-256: 2dfc6b4005785a7045892af8f7b178c4ecc954b23c41e088394c70c5b6555172
font_01_sfnt_off0000675c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x675C 19504 bytes
SHA-256: eb8ce7e3da5a97c3b4f0a1013d81a421e960dbc6320d0a210e145d8bed029be0

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