Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3b154b894a83ce8…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 04:30:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 923e367be4c2f6c127a7d25dbb1458c4 SHA-1: 7f4864bde1cd1efe79f95c334cc586a8271b6a13 SHA-256: b3b154b894a83ce8cfdd315c39f7fed908a86650a5516139308e1bd729c306d8
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and references to game rewards, suggesting a phishing or scam attempt to lure users into downloading malicious content. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of external URIs and the overall context of reward lures indicate a high likelihood of a malicious download or redirection. The document body's content and the heuristics suggest a phishing lure for game-related rewards.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-rewards-2021-game-hack
    • http://www.woundcare4heroes.org.uk/uploads/files/files/100-free-spins-for-coin-master-2021_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/robux-kostenlos-ohne-handynummer-kein-hack_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-arsenal-hacks-download_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/claim-robux_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/tiktok-for-free_GM835599320.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/actual-free-robux_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/prison-life-speed-hack-roblox_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-roblox-birthday-printable_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/minecraft-net-free_GM479516143.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-shoulder-pets-free_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-get-free-robux-generator_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/hack-roblox-for-all-outfits-free_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-make-free-robux_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-cards-hack-2021_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-free-shirts-to-put-up-for-sale_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/dev-console-roblox-hacks_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/robux-hack-with-phone-number_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-do-u-scam-people-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000357b.bin
d6f124bd034babf324823c0723823430bfc7efafad315fb62c6be7ef90d59e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x357B 22712 bytes
font_01_sfnt_off0000685a.bin
cfaa81896c26697e859a4e81b12695d0381909fc96c2a4cad24004b442f99461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 18572 bytes

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