Malicious PDF — malware analysis report

Static analysis result for SHA-256 af8eeecdc788efba…

MALICIOUS

PDF

35.1 KB Created: 2021-06-20 11:18:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 69df6627b1bea163de7b6428d7c0cc7a SHA-1: de71aaf2faafde9d50e389c112edec5bfd328d05 SHA-256: af8eeecdc788efba649e7ce4178caea2147022e3527a35730d7abb968ce9b300
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'Daily Free Spins Coin Master' and an embedded URL pointing to a suspicious domain, suggesting a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of an external URI and the document's content indicate an attempt to trick the user into downloading a potentially malicious application.

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/406889139/daily-free-spins-coin-master-game-hack PDF link annotation
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/roblox-breaking-point-hack-script_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/i-cant-get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-coin-spin_GM406889139.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/how-to-hack-into-any-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • https://www.crackleybank.staffs.sch.uk/admin/ckfinder/userfiles/files/free-daily-spins-from-coin-master_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_off0000333e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x333E 22536 bytes
SHA-256: a692806ee16f4ddb88a46ce32d3ee0a74769d99b2d8385f9a452da8a4dd402e3
font_01_sfnt_off000065a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A2 18596 bytes
SHA-256: e1561e5ad11d6fa371b43628261e275aedbbfff84e2cc2a1b863fefe4a2dbfc2

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