Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec337d7ef1a87bbd…

MALICIOUS

PDF

228.3 KB Created: 2021-07-06 15:16:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e575d1399068d9ed7b7c2bdd46c3bf77 SHA-1: 1d2850001635fc35a9837f1cdc201a38fbc8508a SHA-256: ec337d7ef1a87bbdf1f051cb2a10f9b6857e3e3345dc387aa787c7016f3d1b45
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-100-iv-cp-list-game-hack PDF link annotation
    • http://library.stieyapan.ac.id/repository/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/buy-free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/labyrinth-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/are-robux-generators-safe_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-hack-game_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_off000323f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323F0 25576 bytes
SHA-256: e67b8fc313fde58363a82fe5025748764ab5e68a12fc448ea6dc8044eed4e65d
font_01_sfnt_off00035ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FF4 19152 bytes
SHA-256: 4e0383becd8c9def1760467f7e8de00d5fd2cde3d09f4171ad3d97cd508d0238

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