Malicious PDF — malware analysis report

Static analysis result for SHA-256 9613fe0ad9ce67e3…

MALICIOUS

PDF

35.2 KB Created: 2021-06-19 02:48:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e6b4694fbdb8fcfb9851b4dd5d624acc SHA-1: 11ff7976044e2695a093c019ab635c9f30057cae SHA-256: 9613fe0ad9ce67e3ff20bbd189e8a70b45f442cfcc9404021631e8663f9574cd
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/free-robux-codes-may-2021-game-hack PDF link annotation
    • http://www.eucorro.com/arquivos/files/pubg-uc-logo-png_GM1330123889.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/how-to-get-minecraft-pe-for-free-ios_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-latest-version-free-download_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/como-ser-hacker-en-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.eucorro.com/arquivos/files/roblox-robux-generator-no-human-verification_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_off0000308b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x308B 22484 bytes
SHA-256: 0a39489ada8c578dfaff9207addc81e2c81c7c024b6a56f9f39ca525bb35e9b6
font_01_sfnt_off000062c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62C7 19668 bytes
SHA-256: f08509cc1228082632fbbf0fdc69d8c871a9f1b853e4f0e678bfaaba21f53fba

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