Malicious PDF — malware analysis report

Static analysis result for SHA-256 237d9e7f75328b54…

MALICIOUS

PDF

33.6 KB Created: 2021-07-06 04:25:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6c428f87fa9367b3575380c9f5f1c1fe SHA-1: ab5c40e61b8e65a371a89ae261d3fa90195cc744 SHA-256: 237d9e7f75328b5447959c572cf00a5afc082ab42d07698c59519f609c66726a
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/how-to-get-free-robux-games-game-hack PDF link annotation
    • http://perpus.ftunismabekasi.ac.id/repository/5-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-to-hack-any-game-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/coin-master-daily-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-robux-game-you-achley-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-apk-android-1_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-hack-build-a-boat-for-treasure_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/a-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/roblox-how-to-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/how-get-free-robux-in-the-missions_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/como-hackear-a-alguien-en-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-youtube-video_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ftunismabekasi.ac.id/repository/free-robux-codes-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_off00002e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E76 21576 bytes
SHA-256: 256144aa3756e492ad83f4bda4c4cf9382c2cfec239f5b22f1201400ada65d33
font_01_sfnt_off00005db3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB3 19244 bytes
SHA-256: b8c2daca9de1ad1f1abd6b245aca9824e0b7759a36d278cdc1c8b4996df9d835

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