Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fafb4346f289241…

MALICIOUS

PDF

34.0 KB Created: 2021-07-08 09:54:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b2a61c8c9be462aeba23a1cb96492c49 SHA-1: a0156b8c3d245acbbf370f915d99f0867f3a05ad SHA-256: 1fafb4346f2892410814f3a64db4a52b1470149d2cc1645549be97673b7e16dc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux' and game hacks, directing users to the URL http://netcdn.tw/app/431946152/free-robux-sites-2021-game-hack. This URL likely leads to a malicious website designed to exploit users or deliver further malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-robux-sites-2021-game-hack PDF link annotation
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-hack-scripts-pastebin_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/2021-free-robux-daily-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/roblox-free-hair-catalog_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/not-a-scamhow-to-get-free-1k-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-gamepasses-on-roblox-2021-october_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/this-group-gives-free-clothes-robloxs_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/robux-hack-2021-real-no-human-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://e-learning.man3kabcirebon.sch.id/__statics/gudangsoal/files/hack-accounts-roblox-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_off00002d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D01 22472 bytes
SHA-256: e6b7a3e6449eb8ffdc57ced8de617c58d2787863d10996fc2e6ecd5a73db829a
font_01_sfnt_off00005f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2E 19340 bytes
SHA-256: bf872f38d37b2489c3690af0fb3a59d21ccad535cade2ac40decd632f59a44ea

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