Malicious PDF — malware analysis report

Static analysis result for SHA-256 d71eed741d32e003…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 12:01:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8c4d03739724588723ed5b027b566d7a SHA-1: d272f649dd99c0c01274df4fd91509e52b745247 SHA-256: d71eed741d32e003de17ff006af31d88abf548f3fe5c98bcfa87362707b66d6e
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/freecoins-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robux-hack-mobile_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-back-your-account-from-a-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-gift-card-codes-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-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_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22396 bytes
SHA-256: 460e44d2bd0ee9730ba5f77736b61309e8f8f84b83b715aefb92e39e7fb543d2
font_01_sfnt_off0000620b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 17896 bytes
SHA-256: 95b27e0fe0f8d09f21308dfe7f1e0da3cbc5e6d7e802a0f52430e90404511a42

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