Malicious PDF — malware analysis report

Static analysis result for SHA-256 4711c3807a23a61e…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 22:15:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: de7dcb315bdb967eb09116b7d80060e3 SHA-1: 27ebf37ad87993250bd0d5bf9a2c2443a6242ee3 SHA-256: 4711c3807a23a61e7e238e61eaa8aa9b7ffed2ea579d5800fe36d012de1462f8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which are structured as SEO-optimized slugs pointing to game-related cheats and currency. The document body and heuristics indicate a lure for users to click these links, likely leading to malicious websites or further downloads. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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-codes-for-robux-free-game-hack
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-roblox-money_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-on-iphone_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-roblox-accounts-that-have-1-million-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/what-you-can-do-with-cheat-engine-on-roblox_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-2021-free-spins-link_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-rules_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/pubg-uc-500_GM1330123889.pdf
    • http://perpustakaan.poltekom.ac.id/repository/minecraft-free-install_GM479516143.pdf
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdf
    • http://perpustakaan.poltekom.ac.id/repository/free-robux-apps-that-work_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/roblox-groups-that-give-out-free-robux_GM431946152.pdf
    • http://perpustakaan.poltekom.ac.id/repository/how-to-get-free-robux-on-roblox-pc_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003028.bin
973c237697a529d51aa162b228fadd2f06729b6ead732103f6636a825d6120b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3028 21712 bytes
font_01_sfnt_off00005fe6.bin
ab74f7926278f7abf33301b2fc18154cc382a06876897d2b020c87ce27839413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE6 18964 bytes

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