Malicious PDF — malware analysis report

Static analysis result for SHA-256 2121fe9a793f060d…

MALICIOUS

PDF

35.4 KB Created: 2021-06-28 15:29:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1b2774e682f43bab2ecd8f91b97ea852 SHA-1: a7cb10f6aba3fb8475abcc6c3480237d581a221b SHA-256: 2121fe9a793f060d516260d85f3d6212b9c37ca99dc27157bfe94e19391a25ef
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links, many of which are algorithmically generated and point to files promising 'Roblox Hacks'. The document body explicitly mentions 'Roblox Hack For Android No Survey' and includes URLs that likely lead to the download of malware. The heuristic firings indicate a link farm designed for SEO manipulation, aiming to trick users into downloading malicious content.

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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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-hack-for-android-no-survey-game-hack
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-hat-catalog_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-speed-run-4-level-27-cheat_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-free-bc-account-2021_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-online-dater-clothes-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-2021-sylvester_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-hack-apk-android-oyun-club_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-funds-groups-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-give-tool-hack-pastebin_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-how-to-get-free-codes_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-codes-in-roblox-arsenal_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-walk-through-walls-hack-no-cheat-engine_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/roblox-sex-games-free-entry_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/extension-bigefpfhnfcobdlfbedofhhaibnlghod-mega-securehtml-roblox-hack_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/how-to-sell-clothes-for-free-on-roblox-place_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-toy-codes-for-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-skittles-tshirt-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/hackear-contraseas-de-roblox_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-robux-no-download-no-password_GM431946152.pdf
    • http://digilibfisip.uwks.ac.id/repository/free-dominius-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032aa.bin
addcc005023d519ad9b49be84e2ffb8fd4c43e10b55c03d3f83e4a8643633382		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32AA 22276 bytes
font_01_sfnt_off000063e8.bin
d9851172e6ab47fdf7a7a83af5abae1c25b6680fc1c1c81fa251ae2699149368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 19548 bytes

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