Malicious PDF — malware analysis report

Static analysis result for SHA-256 77230fee0204392e…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 08:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 181a0d2bfa3d1216db1e8bb912ef6af6 SHA-1: 05ead3ff514c606b0be98a7432213548ac3c6acf SHA-256: 77230fee0204392e2c9ca9b0de6908a22f51ea6dd7beef6b2013db878ed2ac90
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/406889139/sb-game-hacker-coin-master-game-hack PDF link annotation
    • https://lib.bunghatta.ac.id/app/repository/robux-hack-sur-pc_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-how-to-get-free-clothes-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-swat-roblox-jailbreak-pastebin_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-speed-hacks-free_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/what-groups-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-vampire-hunters-2-credit-hack-script_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/robux-free-tips-download_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/hacking-incident-roblox_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-hack-server_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-no-human-verification-2021-or-survey-or-offers_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-robux-pin-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-promo-codes-roblox-july-2021_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/roblox-lifting-simulator-cheat_GM431946152.pdfIn PDF document text
    • https://lib.bunghatta.ac.id/app/repository/how-to-hack-robux-into-your-account-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_off00002f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F63 22448 bytes
SHA-256: b181200698484baa4ab9ccd38ad3c75a3c2500ea8e76553f473ff1fcd78e1824
font_01_sfnt_off00006158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 18420 bytes
SHA-256: 6a53dc8f067a419c9eeb2c0c5bc72e0738835f67cea1574c478c8e2ae405105c

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