Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1d2baf4edd0cd4…

MALICIOUS

PDF

35.6 KB Created: 2021-06-19 13:48:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fccf25558ae60ca7e5c3a43c2926a36b SHA-1: 556f93d567c953576a24355958b0133be649c4be SHA-256: 1c1d2baf4edd0cd42eff5cea735df247d97a5682eb3ae33f1a6088000de639ce
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links, identified as a link farm, designed to lure users into downloading potentially malicious files by promising in-game currency or hacks for games like Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a call-to-action phrase further supports a malicious intent to trick users into clicking on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-free-complete-game-game-hack
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/currency-hack-roblox_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-roblox-phantom-forces-hacks_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-ten-dollarr-roblox-gift-card-codess_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-do-you-get-tickets-on-roblox-for-free_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/dragon-ball-online-cheats-roblox_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-roblox-promo-codescom_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/10m-8-7m-17-free-robux-daily_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-hack-into-others-peoples-account-on-roblox_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/tener-robux-gratis-hack_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/real-robux-free_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-today_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/robux-fun-hack_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-design-it-cheats_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-free-robux-on-roblox-com_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdf
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-free-robux-on-samsung-tablet-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003342.bin
d7f82e752667aa824b9c4edcf6766115e4db9eabbfc8bccba8a57bed34478029		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3342 22656 bytes
font_01_sfnt_off000065c5.bin
1e1a09b0c7ad4413e71996cb2e61e9bc70ec3fd63fd9fd61abb223615f6582f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C5 19188 bytes

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