Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08d7c1d9afe72b0…

MALICIOUS

PDF

35.2 KB Created: 2021-07-07 20:39:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 891a38b94be2ae9a03553998eda33aaa SHA-1: 42d9067aa22db344088f6bae21ab69fb6ce74a8b SHA-256: c08d7c1d9afe72b0622603dc71bee92f59f2fe40fbccafc54ce672d80b9d6bd7
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/robux-free-promo-codes-game-hack PDF link annotation
    • https://digilib.stimlog.ac.id/repository/descargar-hacks-para-roblox-2021-sin-parchear_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-without-games_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-cheat-for-brick-bronze_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/100-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/comoponerse-hacks-en-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-tiktok-free_GM835599320.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-earn-free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/hack-rogue-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/try-minecraft-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-geld-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/unlimited-robux-hack-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-roblox-shiny-charm-for-pokemon-prick-bronze_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3355 22012 bytes
SHA-256: 65420ddc757714b7746abef29bad75e150b90f6855ae8dd7bc041b6ba35a795c
font_01_sfnt_off000063fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FE 19304 bytes
SHA-256: c1af96096ee4fe66b31908d73526086302c421ddc21d11abc86e2e14451b0c0a

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