Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b5b0ef5f52e6a5…

MALICIOUS

PDF

36.4 KB Created: 2021-07-05 16:22:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f9e2488dbfcc71c323a7833f4c49164a SHA-1: d9584b44fea488052d21d451b710ab35f32c2b5c SHA-256: 78b5b0ef5f52e6a5bcdc0e24c16fc45023adee9c217df2d86e9c4a4617d63f47
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/download-coin-master-free-spins-link-2021-today-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/spin-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-weight-lifting-simulator-2-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-a-roblox-user-account-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-do-you-get-free-roblox-coins_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-para-borrar-paredes-en-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-unlimited-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/logiciel-de-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-guest-play_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-accounts-2021-list_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-items-thumbnail_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-robux-without-paying-or-hacking_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/city-17-roblox-token-hack-dll_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-on-roblox-on-iphone_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-without-installing-anything_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_off000033d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33D4 23168 bytes
SHA-256: 4c8998e6e67f800f053e34abdadb21f2ed3a7e05a7e87daf3a297977ab802c69
font_01_sfnt_off00006808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6808 19504 bytes
SHA-256: 95988c68448a1ca754540d0d2f4ef0d2771c8f39fe215f992d1da7c8ae6d62cf

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