Malicious PDF — malware analysis report

Static analysis result for SHA-256 22167c77c4636364…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 15:32:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2a8b4c11ac35cc785c2c95a77413419c SHA-1: 3e884e3fbb0ff611b23d6d92581ba32edc2b96f7 SHA-256: 22167c77c4636364f2089499046949facfdb4dedf7ccd4310b63ea16f7c89604
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.co/app/431946152/robux-free-codes-no-human-verification-game-hack PDF link annotation
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-spins-for-coin-masters_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-vehicle-simulator-free-money-codes_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/robux-prices_GM431946152.pdfIn PDF document text
    • https://elearning.tawakkal.sch.id/__statics/gudangsoal/files/roblox-rape-hack_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_off0000321e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321E 22320 bytes
SHA-256: 65aa32ec7f333430dcbc862da3fc73685e6b33eac7fedcbc7a6e5604086bcdb6
font_01_sfnt_off000063f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F2 19324 bytes
SHA-256: e8752697d8a29aebad8902775773cdef9417fcf4b3de35207613847e778209a4

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