Malicious PDF — malware analysis report

Static analysis result for SHA-256 8605c88e58bdb5ea…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 09:27:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e8f7848ba811efc6c2a1aa6eb37b2de8 SHA-1: cd8aeb47f547cfdc0a722c7e0d2e3573007fe6fe SHA-256: 8605c88e58bdb5ead4d6d1744bcd0ca3b8debfabf95e859c9165dec9397f4ce4
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a visual download button lure, suggesting an attempt to trick the user into downloading malicious software. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains references to 'free robux' and 'game hack', aligning with common social engineering lures for potentially unwanted applications or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • 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/431946152/huskybuckscom-free-robux-game-hack
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/minecraft-free-exe_GM479516143.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-generator-free_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-generator-com_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-robux-download_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-daily-spins-coin-master_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/smart-lodhi-coin-master-hack_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-free-robux-no-human-verification_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-can-you-get-free-robux_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-hack-2021-ios_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/roblox-adopt-me-hacks-2021_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-hack-roblox-accounts_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/who-to-get-free-robux_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/how-to-get-free-robux-for-kids_GM431946152.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-spins-and-coins-coin-master_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-coins-link-facebook_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-coin-master-credit_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/coin-master-free-rare-cards_GM406889139.pdf
    • https://na.itk.ac.id/asset/backend/upload/ckeditor/files/free-coins-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000524d.bin
64d2d63f3209e8e8bf2f35279714ebe07100ccf3fd343000d2b00d2d42f587fe		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x524D 24464 bytes
font_01_sfnt_off00008a75.bin
f893a3bff8774b7ed5d4e22eaab63b6b5727efd4274e33d815ecbde6c17ee355		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A75 18624 bytes

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