Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5978b0d797c055…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 05:21:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 133efcac2b4dcd45aa6f287a651f3d64 SHA-1: f33e0cf292714b99eb399b582246765b793a17c9 SHA-256: fb5978b0d797c055671f83a90d505ad38beb8d1da55138efced7e987e987d87b
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-roblox-accounts-with-robux-that-work-not-banned-2021-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/android-oyun-club-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/withdraw-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-play-login_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-hack-unknowncheats_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-on-mobile-ios_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-catalog-free-items_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-pets-simulator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-pastebin-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/download-coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/easy-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-activation-code_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-robux-2021_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_off0000304f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304F 22056 bytes
SHA-256: de8fd30a92f34a7ef583328ea1fd9486d24069c37bc07c780af18d0f2aa7e460
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 20124 bytes
SHA-256: e8dc8af608a2467c92ba912a1f660b74916591188ffd601a7d8b89018af53e3a

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