Malicious PDF — malware analysis report

Static analysis result for SHA-256 b167b6dfb013eb8e…

MALICIOUS

PDF

33.5 KB Created: 2021-07-04 07:45:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6abb98b912a508eac49b7a39a8d241d1 SHA-1: 2f4a704db9844c2e64e8fbc272567f1ad2cf6d86 SHA-256: b167b6dfb013eb8ed6e16c74ed6e07e9f591ffb66f7a22b3357acceb72ad3e5e
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/login-robux-game-hack PDF link annotation
    • http://perpus.stfm.ac.id/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-from-your-game_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/roblox-thomas-wooden-railway-free-demo_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-hack-roblox-client_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-hack-ipad-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-daily-free-spins_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_off00002e1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E1F 21988 bytes
SHA-256: 9b6a95ffeaf4bc8b301174c28f9b77d8c760a49f5cefb574a529600f6436f57a
font_01_sfnt_off00005ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA6 18672 bytes
SHA-256: 0ae16703f09f73d315d66226a0dafe23a46f740b34e9acc2d6474ce0ffb88923

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