Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e3b41967f6d522…

MALICIOUS

PDF

46.4 KB Created: 2021-06-03 06:32:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 13625b933a7832187547806d913c8d1d SHA-1: 60103be1afb7cfb29dd4d6c4c4ce33e5c4aca301 SHA-256: 17e3b41967f6d522394207d35b0b429f9a6f375c6bcf8d0f632f0c3e2bcdf18d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure and a visual download button, aiming to trick the user into clicking a link. The embedded URL, https://netcdn.online/app/406889139/coin-master-hack-2021-ios-game-hack, likely leads to a second-stage payload download. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 5

  • 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
  • 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 https://netcdn.online/app/406889139/coin-master-hack-2021-ios-game-hack
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-800-robux_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/roblox-phantom-forces-hack_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-robux-codes-2021-not-used_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-free-spin-app-apk_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-free-cards-link_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/tiktok-free-online-textbooks_GM835599320.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-can-u-get-free-robux_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-robux-group_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/robux-free-online_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/minecraft-building-hacks_GM479516143.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-play-minecraft-for-free_GM479516143.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-minecraft-pe-server_GM479516143.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/roblox-apocalypse-rising-hack_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050ad.bin
4d3b57eb289729c1a70a4bd0f38e999470450eb21dcfde4d4516173a0a79c422		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50AD 24616 bytes
font_01_sfnt_off00008913.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8913 2840 bytes
font_02_sfnt_off000092c4.bin
77442674c0809aead75be931568f5718e5115af80d9dd84d81b0bed7d24a7281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92C4 18116 bytes

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