Malicious PDF — malware analysis report

Static analysis result for SHA-256 469c7ff024c6adbf…

MALICIOUS

PDF

35.5 KB Created: 2021-06-23 02:04:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7a1847fc61c2813b46ec16d55924d91a SHA-1: f0fccb919b9d6ec813f4b5e6a8cab017c08654bf SHA-256: 469c7ff024c6adbf5b1c68f71ec0b605207cddbf209a1f9e836ce380f04fa464
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and text related to 'free Robux' and game hacks, indicating a lure for potentially malicious downloads. The presence of an external URI pointing to a suspicious domain further supports this. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-hack-no-verification-game-hack PDF link annotation
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-hack-all-badge-script_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/what-pubg-uc-buy_GM1330123889.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://www.springhead.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3392 22260 bytes
SHA-256: f6d69f8025e5ae73c6755203c5c925c0a1fdc2f986853dfe0746b7ac72b992d8
font_01_sfnt_off00006536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 19244 bytes
SHA-256: 96540bd7c84d60e769713d590412c745bf113fce47b0f54684cca50d2dde6ca8

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