Malicious PDF — malware analysis report

Static analysis result for SHA-256 4335ddb4b6c615bf…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 09:15:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d27cd4efbce80f5c6e813a9b88fef738 SHA-1: d86417d4e3d1fc87b3c4e17f8cfa4cad6f86efb3 SHA-256: 4335ddb4b6c615bf530908f749ace23ac80776a6fdf9da321d043268cbd5b6ff
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/406889139/coin-master-free-coins-and-spins-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-password-and-username_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-do-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-legit-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-pet-simulator-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-health-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/descargar-roblox-hack-robux-pc_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-400-robux-promo-code_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-how-to-get-free-robux-june-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-ios-reddit_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-tycoon-money-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/play-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hack-mod-menu-download_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-codes-for-roblox-case-clicker_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-clothes-in-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-para-roman-aegyptus-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/denisdaily-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_off00003131.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3131 22956 bytes
SHA-256: 1306d4c3ddeacd52e920d6e2551e842437cc1ae6c4d9ca7dd69394e62d86e8ec
font_01_sfnt_off000064b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B4 18348 bytes
SHA-256: 8f4e14d352258b2a04c4750a5c5e6ee18e44525ef82eed3820f54d352c64eef8

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