Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa85ea1505b9a419…

MALICIOUS

PDF

227.8 KB Created: 2021-07-04 02:08:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2a79ecb82172c6162dc405da4cba19a3 SHA-1: 63f26d71c28fecb051e356e3dc85782f0daba10a SHA-256: aa85ea1505b9a4199cfbcacdadc7565f7ddb02ed18654e64832c734e6d906e74
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 0.0117

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-quiz-game-hack PDF link annotation
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-mobile-2021_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/gg-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/roblox-wizard-life-money-hack_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-ios_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/inspect-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/regular-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/roblox-army-free-robux_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_off000322e1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322E1 25576 bytes
SHA-256: 89d342ea54e9e72f4821b9c70c4a17cdc2a43cf99d6e7d63862078537bb5ea2e
font_01_sfnt_off00035ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35EE7 18860 bytes
SHA-256: 01a3a7bca26cd193cd16223b5de2dcf075b7074b475f6ed68952975bfb00b490

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