Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf14aba39e96e01e…

MALICIOUS

PDF

48.5 KB Created: 2021-06-07 10:13:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 723e328582b429a03c8985747b23560e SHA-1: ee233883f73635a9b93e4777b28456dbbf9d5046 SHA-256: cf14aba39e96e01e724bf2e3505a07ad6bc47de36f17b60b4aedcf09dc4f99ed
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 0.9796

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.tw/app/431946152/how-to-hack-roblox-scripts-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/woman-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-spin-generator_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/nike-roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/mc-hacks_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/tiktok-free-fans-2021_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50B3 27816 bytes
SHA-256: 8c9417bdad1cbdb406de4a6489be855ebe5027d53de7bfbe10bb2fab6addaa25
font_01_sfnt_off00008fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FAE 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009960.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9960 18748 bytes
SHA-256: dfd117ef57f3a13289e6fde54c8ba5452222bd15c041ada9ced33b9f4e8d0237

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