Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73fa1e915e1a879…

MALICIOUS

PDF

57.4 KB Created: 2021-05-12 19:17:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 564fe7290bc6ed37339bc035081dca84 SHA-1: 11229a4864b42b1a9352c09bf801c638eece3703 SHA-256: d73fa1e915e1a8792ef772e9f9824e34253ba38a1dece76d4dbb2cc43d078e8a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs and a document body that promotes "free spins" and "hacks" for popular games, indicating a lure for potentially malicious content. The heuristic firings confirm the presence of a large number of external links, suggesting a link farm designed to redirect users. While no scripts were explicitly extracted, the nature of the content and the ML classification strongly suggest malicious intent, likely to lead users to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8160

Heuristics 4

  • 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.
  • 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/406889139/100-free-spins-coin-master-link-game-hack PDF link annotation
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/tower-of-hell-roblox-hack_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-free-cards-link-2021-today_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/roblox-piano-hack_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/free-minecraft-gift-card_GM479516143.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://beershebaschool.edu.np/ckfinder/userfiles/files/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F0C 31172 bytes
SHA-256: 66e867e63c42f70a5c8578599b47c9e62ff0f9d5e081231ecf4d604dc8bbe056
font_01_sfnt_off00009195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9195 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off00009c60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C60 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000af85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF85 18336 bytes
SHA-256: 9c7d71bf4653e82f34779ff687ecc32abef763f146c991042409a9b1562a78ec
font_04_sfnt_off0000d1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AA 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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