Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b875f20d4912d2…

MALICIOUS

PDF

33.4 KB Created: 2021-07-08 20:11:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 92b8ab82464a6a72e633ab4028ab9460 SHA-1: 4cdab8a76ce98cf0e4a4565c1425d2c5f71cd8ab SHA-256: b7b875f20d4912d260e0b046f2db367111598e76902ff535dfed3230f677c80d
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/how-to-robux-game-hack PDF link annotation
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-no-ban_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-to-get-free-robux-and-tix-in-5-minutes_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/tiktok-free-real-likes_GM835599320.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-scarf-on-roblox_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/free-spin-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/no-human-verification_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/tiktok-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/pubg-uc-hack-2021_GM1330123889.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/minecraft-mobile-free_GM479516143.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_off00002c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C11 22584 bytes
SHA-256: 443395b31e0d6c5d66dc495d962c8972dede24dec18f5f2da3a7304d0171e2fa
font_01_sfnt_off00005e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E1D 18716 bytes
SHA-256: 81085473f4b1e3c22888fbcbdc36b36c4cbedeb7fb75c0ceb2fc7ec450597488

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