Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37f5971a95f913e…

MALICIOUS

PDF

229.8 KB Created: 2021-07-06 10:05:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 13b56b8e9d56f0d42b164d83a9f09bed SHA-1: 9e592c8fa1d67e479fa75ba42192d7c87e51e96f SHA-256: b37f5971a95f913ea06a2d37c9cef9df56a79260d1d417d1ae9b3d499e371b79
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 0.0101

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-daily-box-game-hack PDF link annotation
    • https://c2o-library.net/catalog/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-no-verifaction-or-servey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-templates_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/synapse-x-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-free-account-biz_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/dss-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-roblox-system48-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacked-money-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/ooby-give-you-free-robux-husky-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-accesories_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/comoponerse-hacks-en-roblox_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_024_off00032917.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32917 25728 bytes
SHA-256: 78382b44671280fabebb45674f1449404354d835eb519a8781cc0700a31442b5
font_01_sfnt_off00036543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36543 19328 bytes
SHA-256: 028f2746c29a31fd7225df6e0aedd535234230c1df2dc4495f5197de5e4ef0b6

Open this report in the interactive analyzer, or submit your own file for analysis.