Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2f6a585adc072dd…

MALICIOUS

PDF

32.8 KB Created: 2021-07-06 05:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 3befbf9b6a20dd0973fd5ba51ba76ac3 SHA-1: 80f850fa53d5c0582a4329a8b73c5ce8c15cf076 SHA-256: b2f6a585adc072ddeb4f188f1d3b546ebd051f935b608731410b699a3bb3a0db
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/rbx-hut-promo-codes-game-hack PDF link annotation
    • http://projectunionstreet.com/library/repository/free-roblox-hair-boy_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/code-hack-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-join-anyone-on-roblox-without-hacking_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/roblox-tix-hack-2021_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-skins-in-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/hack-using-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://projectunionstreet.com/library/repository/free-spins-and-coins-on-coin-master_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_off00002c81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C81 21156 bytes
SHA-256: 784013a2c85bfd59e221dbfb46ba2755ed9c8001da8a05e17f3c984a34966fe4
font_01_sfnt_off00005a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A69 19244 bytes
SHA-256: 782a737def693689e4b5665cffc47cc258515f3f674248a8a55cde411c40cafc

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