Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6ea08d92d8575b3…

MALICIOUS

PDF

227.1 KB Created: 2021-07-06 09:31:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f1e796b52a9063b512dbb62168e8f511 SHA-1: 9d60d1002eae429c9cb226788d05d11f3664b4bd SHA-256: c6ea08d92d8575b37a3b9754116d0118ae0a52fb70c6d6a27d9d173ffc7dea3a
172 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses a fake browser/software-install lure and a fake-CAPTCHA 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 clean score 0.0118

Heuristics 7

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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 http://netcdn.tw/app/1094591345/pokemon-go-free-online-download-game-hack PDF link annotation
    • http://lib.icbc-indonesia.org/repository/free-roblox-exploit-no-crash_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-in-cheat-ingine_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/freespincoin-masterlinkdownload_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-printables_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-get-free-1-million-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-buy-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-stuff-on-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/gamecheat-us-roblox-hack_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
stream_023_off00031fc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FC6 25576 bytes
SHA-256: bca58b560b5dea18cd9df015d3fc35736261f2320ca9eb7a3aba96bbad5306f7
font_01_sfnt_off00035bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35BC3 19056 bytes
SHA-256: 4b4e6e23247a4f8a646bd6f2309ffa0f8500441bd03150b550db56d2d26eda57

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