Malicious PDF — malware analysis report

Static analysis result for SHA-256 21359fafbfa29265…

MALICIOUS

PDF

34.0 KB Created: 2021-07-06 01:59:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0fae0b3ab62ebcbff99ce04d4cedf720 SHA-1: 4d35bcc435b4b70fa533f3b0d613a7341a40d350 SHA-256: 21359fafbfa29265e0aaac8a9022b1ad36ba7098a73e79ee5ea8d05ad5bab181
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-hack-robux-game-hack PDF link annotation
    • http://library.umla.ac.id//repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-get-free-robux-online_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/universal-minecraft-converter-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-daily-free-coins-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/unlimited-robux-hack-add_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/nicsterv-how-to-get-free-robux_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_off00002f77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F77 22060 bytes
SHA-256: 4d35840e5c103ce38d56ffc1d8aae96b2d26410bdce01395b7c8e7949572027e
font_01_sfnt_off00005ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FFA 18884 bytes
SHA-256: eabb09a914750731f64ad11a0b688188fe1798403d7ade495959fd69a4976413

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