Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d3eb678e7d3d3e…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 04:26:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c655c81d825e087a12dfaea6f8084a10 SHA-1: a260bc861681f816492e9c8fa9ecbac7193491f7 SHA-256: 67d3eb678e7d3d3e846df8dc695606f943b7adf310eb7b2aab08672322258ebf
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and embedded URLs suggest a lure for game-related cheats and hacks, likely intended to lead users to download malicious software. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a call-to-action button reinforces the malicious intent. No scripts were extracted from this sample, but the overall pattern is consistent with a phishing or malware distribution attempt.

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.co/app/431946152/how-to-hack-kingdom-life-in-roblox-game-hack
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-minecraft-client_GM479516143.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-hacks-2021_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-codes-for-roblox-wild-revolvers_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-hack-apk-2021_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/claim-free-robux_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/can-i-play-minecraft-for-free_GM479516143.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-spins-coin-master-legit_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/hack-coin-master-game_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-robux-cards_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-robux-generator-no-download-no-surveys-2021_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-free-spin-realme-products_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-spin-coin-master-game_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/robux-com-free-robux_GM431946152.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/coin-master-32-hack-apk_GM406889139.pdf
    • https://sf.nationalbreedingcenter.bz/ckfinder/userfiles/files/free-minecraft-svg-cutting-files_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003246.bin
390f563c98751fd594489a4b85872b26ca84894761b6a647a4d2754d4ac2a537		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3246 22296 bytes
font_01_sfnt_off000063f8.bin
1114282196b6b4641bdb2f3d0eae4f859c4479284c7062cb13d5c0d8e7225c86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F8 19188 bytes

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