Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7bd49ea71a02db…

MALICIOUS

PDF

47.8 KB Created: 2021-06-09 07:25:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 89947b898705c1ac9645f194a810401e SHA-1: 869f4213bf20bb2fe45a69f1e7c747889d07cae0 SHA-256: ab7bd49ea71a02db002926fd50d938b39ddffadde4f98bd99d4e4245ca95e95c
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. The embedded URL and numerous other URLs point to sites offering game hacks, suggesting a social engineering attempt to deliver malware. No scripts were extracted, limiting further analysis of the payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.tw/app/431946152/roblox-obc-hack-2021-game-hack
    • http://elibrary.smknesbu.sch.id/repository/assassin-hack-roblox-2021_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-easy_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-spins-for-coin-master-app_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-free-spins-daily-link-game-mod_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-daily-spins-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-2021-august-codes_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-robux-hack-2021-cheat-engine_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/apk-coin-master-hack_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-tool-no-survey_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-without-downloading-games_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/coin-master-links-free-spins_GM406889139.pdf
    • http://elibrary.smknesbu.sch.id/repository/we-hack-robux-generator_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/roblox-pokemon-brick-bronze-shiny-hack_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/how-to-robux_GM431946152.pdf
    • http://elibrary.smknesbu.sch.id/repository/minecraft-free-no-virus_GM479516143.pdf
    • https://robuxhaxs.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005119.bin
17bd752dbf5c2c14a4f62ad50c2ef907fc8afe21836f9e45c1387fe1422077d0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5119 25808 bytes
font_01_sfnt_off00008d5f.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D5F 2824 bytes
font_02_sfnt_off0000970e.bin
ae7abf57dea872f4f3d423706e2651972ad01baa3da83416a47396e6b813843c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x970E 18584 bytes

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