Malicious PDF — malware analysis report

Static analysis result for SHA-256 8686e176ebda5aaa…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 03:54:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3f0e0d4d93ff93b0088f9afe332e7230 SHA-1: 59b5d96fe94ae8cd0fb0a625963168634d9e470f SHA-256: 8686e176ebda5aaab96a3af856a8fc5cdd66ad612193959e727f7d6dc6f52017
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent external URI pointing to sites offering game hacks and free coins, indicating a lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of embedded URLs and the document's theme suggest an attempt to lead users to a malicious second stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-coin-link-coin-master-game-hack
    • http://easytransferbrazil.com/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • http://easytransferbrazil.com/images/free-robux-generator-no-verification_GM431946152.pdf
    • http://easytransferbrazil.com/images/hack-para-coin-master-sin-verification_GM406889139.pdf
    • http://easytransferbrazil.com/images/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://easytransferbrazil.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/roblox-data-breach_GM431946152.pdf
    • http://easytransferbrazil.com/images/robuxy-com-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/coin-master-hacks-for-free-spins_GM406889139.pdf
    • http://easytransferbrazil.com/images/what-is-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/coin-master-hacks-for-spins_GM406889139.pdf
    • http://easytransferbrazil.com/images/robux-hack-tools_GM431946152.pdf
    • http://easytransferbrazil.com/images/wahoo-gaming-co-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/free-robux-that-actually-works_GM431946152.pdf
    • http://easytransferbrazil.com/images/mcpe-com_GM479516143.pdf
    • http://easytransferbrazil.com/images/coin-master-rewards_GM406889139.pdf
    • http://easytransferbrazil.com/images/rbx-free-robux_GM431946152.pdf
    • http://easytransferbrazil.com/images/http-blackgamesus-coinmasterhack_GM406889139.pdf
    • http://easytransferbrazil.com/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://easytransferbrazil.com/images/coin-master-free-coins-2021_GM406889139.pdf
    • http://easytransferbrazil.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a2e.bin
4d63aa5f25cef96687cb5d0b8c0b31d3af16466099ff9575d12930be8de412d5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A2E 24100 bytes
font_01_sfnt_off00008137.bin
0625e4176a7f53d001741f6455d720615efffd3608056e1f92d89c9c6799a538		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8137 17880 bytes

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