Malicious PDF — malware analysis report

Static analysis result for SHA-256 27cba067d4b157cf…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 14:09:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 9ca14fc398384a63e9cf580a9de59a49 SHA-1: 4b0df8d6d012181449a50a87eb1a05c127f0526e SHA-256: 27cba067d4b157cf5bbd6f7d4d21afa1d9acb1e4038c99bd1a81af0bda71e97f
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/835599320/follower-fr-tiktok-free-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-roblox-girl-clothes_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-clothes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-hack-download-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-game-download-mod-apk_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_off00003499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3499 22332 bytes
SHA-256: 23bb8825f94940860adc52fd1d397aa9b9dc5ff42d7136259253da85739202f3
font_01_sfnt_off00006621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6621 18208 bytes
SHA-256: 882ecd1a414c3495c66c8bd59bb6cf010fc72d5f93c5a690c281f14abb518725

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