Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f5899eb3a3ef71…

MALICIOUS

PDF

43.5 KB Created: 2021-06-09 10:52:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 381ea5e98f78176de333ba662912722a SHA-1: 1e2149b8c71a43624f83f7d1f8ab6582fd364319 SHA-256: 22f5899eb3a3ef714d148f74c6117bd618ceb5695d6167d617a8e793b7116d56
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. 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 0.9865

Heuristics 5

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.tw/app/431946152/dragon-wings-roblox-free-game-hack PDF link annotation
    • http://lawpatron.ru/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/tiktok-free-wallpapers_GM835599320.pdfIn PDF document text
    • http://lawpatron.ru/images/woman-roblox_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-get-minecraft-for-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/how-to-get-free-robux-that-is-real-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lawpatron.ru/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://lawpatron.ru/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://lawpatron.ru/images/earn-robux-today_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_off00004e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E61 24000 bytes
SHA-256: 8fc1b66f5247dc4ccfbcc8de8a9eb57849cf0cdb5147ca44392be965e28d9fd1
font_01_sfnt_off0000850c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x850C 18952 bytes
SHA-256: d2b9ba685555645e1ce5502677dacb3eb53e6a1eade559ffa99a64b9284bcd8a

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