Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c4827c4d36c30d…

MALICIOUS

PDF

227.8 KB Created: 2021-07-04 20:37:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5002877a163700992dd1b0eb6637fea9 SHA-1: 0e50d66cbb033b4aecd76801f1825d19a5f189ec SHA-256: 75c4827c4d36c30d4bbdb15676fc103f45b8e0581afa5a1c2d90b7489a418d75
192 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a download button, common social engineering tactics to trick users into installing malicious browser extensions or plugins. The embedded URL http://netcdn.tw/app/1094591345/pokemon-go-free-legendary-game-hack likely leads to the malicious download. The document's content and heuristics suggest a phishing or malware installation attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 8

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-legendary-game-hack
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/roblox-vampire-hunters-2-hack_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/my-roblox-account-was-hacked_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/how-to-get-free-unlimited-robux-2021_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-coins-coin-master_GM406889139.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/hack-coin-master-iphone_GM406889139.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/master-coin-free-spin_GM406889139.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-python-2021_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-hack-version-33-2_GM406889139.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/minecraft-pe-free_GM479516143.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-no-password_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-games-like-roblox_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/tiktok-free-games_GM835599320.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-roblox-clothes_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-coin-master-spins-for-today_GM406889139.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-games-on-roblox_GM431946152.pdf
    • https://www.solararabialtd.com/uploaded_files/userfiles/files/free-robux-com_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00032354.bin
9b2b092c776e6ece052eeaa569eb667a2b5946aebeba8e1231356d4f2dfbd72b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32354 25576 bytes
font_01_sfnt_off00035f5a.bin
537181f9f38eff4f127cfc458bd58b3b8064d1512a4ad3037c6d34eca5fa4315		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35F5A 18712 bytes

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