Malicious PDF — malware analysis report

Static analysis result for SHA-256 4215bed67e42ec95…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 04:26:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 81224b751e5b68df7b32bc4577a9cd25 SHA-1: 10bb73ba0ce94719fc732cec923e978d11e1f166 SHA-256: 4215bed67e42ec952d17d275eb5ee0c1e2b5b3c259c6db03dd948a8461c9fdb0
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 0.9832

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 https://netcdn.online/app/406889139/coin-hackhub-coin-master-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-m-coins-mcpe-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/pubg-uc-top-up_GM1330123889.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/www-coin-master_GM406889139.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
stream_004_off000051a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A7 32716 bytes
SHA-256: 81631eb46df42a3d9def7d247a3bc8568aa61dabec5766efa93738df5f52f6d8
font_01_sfnt_off000095e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95E4 18180 bytes
SHA-256: 3e446247a49d951aa8430509ca7ad6212ec8b96ad829497680ba4896a901c53d

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