Malicious PDF — malware analysis report

Static analysis result for SHA-256 c17b4d83857c091c…

MALICIOUS

PDF

226.9 KB Created: 2021-07-04 12:43:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: adb8a72f413e9818c6ef49171f2e59c1 SHA-1: 84d8822a657e6cbf6927acd3657f93b555912df4 SHA-256: c17b4d83857c091c624e197b9f4cf47f7c7fb177f7bd0cc256dd0ed7844d37ae
132 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action button, common lures for social engineering. It also contains an external URI pointing to a potentially malicious download site. The document's content and heuristics suggest it aims to trick users into installing unwanted software or browser extensions.

Machine Learning

  • Nyx PDF Classifier clean score 0.0117

Heuristics 6

  • 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-or-james-game-hack
    • https://easypay.af/uploaded_files/userfiles/files/free-open-source-roblox-exploit_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-spin-link-in-coin-master_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-hack-2021-no-survey_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/roblox-online-free-no-download_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-minecraft-domain_GM479516143.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-hack-tool-india_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-spins-on-coin-master-hack_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/eclipsis-roblox-hack_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-promo-codes-roblox-list_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-get-free-clothes-roblox-2021_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/roblox-free-download_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-spin-hack-app_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/free-spin-sites-for-coin-master_GM406889139.pdf
    • https://easypay.af/uploaded_files/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/was-minecraft-ever-free_GM479516143.pdf
    • https://easypay.af/uploaded_files/userfiles/files/easy-robux-hack_GM431946152.pdf
    • https://easypay.af/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00032064.bin
67af8f592de22dda8fdeceba285bf50e801d4967bb2b439903753cf9c3e3e135		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32064 25576 bytes
font_01_sfnt_off00035c63.bin
4ab4ef1f41652d58e56de9b1445ccbf965f6aec731461d0540821df21ea70c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35C63 18524 bytes

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