Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3221a4ab7f640ac…

MALICIOUS

PDF

33.2 KB Created: 2021-06-20 02:02:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3eaba472c34b7b219a0449c9aa3927bb SHA-1: e45f97e0955a5d7fcee0047fa61a649434389ba1 SHA-256: f3221a4ab7f640acbc66b9d2db72021fcb9204a57d0452643021e9b33567c54a
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 0.9824

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.co/app/431946152/hack-de-juegos-apk-robux-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/pro-skin-free-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/pokemon-go-no-free-raid-pass_GM1094591345.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/top-5-games-on-roblox-that-gives-me-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/bl4z3-games-com-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-girl-clothes-codes_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_off00002aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AEF 22188 bytes
SHA-256: 0a0b99eb4caa7e2738503580a6154c1948724955fcaeda7346e4cf9a9c0cb1e0
font_01_sfnt_off00005c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C47 19232 bytes
SHA-256: a37939d3b565147d18e9d30057037a8cf2038ef9b5a8fd817592c7b557656e76

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