Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd02151cdfe6460…

MALICIOUS

PDF

34.1 KB Created: 2021-06-18 09:55:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 65c65f92d4eabbf1872af50b1fae4afb SHA-1: 787498e24be02e408e213c6520d9d31e5b911066 SHA-256: ebd02151cdfe64602211934ac815d702b4964a8cba2b831da6f21ce26d0d219e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a mass of external links, many of which are related to game cheats and hacks, suggesting a lure to download potentially malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports this. The document body contains URLs that likely lead to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-injector-for-roblox-v3rm-game-hack PDF link annotation
    • http://lib.vipklh.ru/repository/hack-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-builders-club-free-download_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/pokemon-go-free-download-android_GM1094591345.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-shirt-templates-roblox-olympique-lyonnais_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-hack-clients-2021-aimbot-island-royale_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-get-a-free-pokemon-go-account_GM1094591345.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/how-to-hack-john-doe-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/youtubecom-ultraw-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/robux-hack-html_GM431946152.pdfIn PDF document text
    • http://lib.vipklh.ru/repository/coin-master-hack-no-root_GM406889139.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_off00002df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF7 22084 bytes
SHA-256: 52797206caded53c49487b830fd9ad3a357e3822a6f72ce393bbdc272126f336
font_01_sfnt_off00005ec8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EC8 19508 bytes
SHA-256: 071fdb76c0be1d925cfb078a6530d8bf3b1f0d56031ee7520da5c3fa138a259d

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