Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d49d4d69242f18…

MALICIOUS

PDF

47.1 KB Created: 2021-06-07 11:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d7634e56898c24f18bf695377b9c1cd5 SHA-1: 6dfc48cbe3f3ed2897cc164291115c8bfaa99d53 SHA-256: 54d49d4d69242f18b3734bc97ec3a72433f9a34917c25134eec65d3f050f2bdc
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt to trick the user into interacting with a malicious link. The embedded URL and numerous other URLs point to sites offering 'free Robux' or game hacks, a common lure for distributing malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/how-to-get-free-robux-2021-with-no-inspection-game-hack PDF link annotation
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/roblox-character-boy-free_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/bhop-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/how-to-get-free-robux-instantly-2021_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/bugmenot-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/claim-gg-free-robux-by-roblox-events_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/pastebin-robux-hacks-for-free_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/roblox-apocalypse-rising-hack-download_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-robux-generator-2021-vrai_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-doing-surveys_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://ttikhuruthang.bt/wp-content/uploads/fsqm-files/roblox-hack-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5448 27080 bytes
SHA-256: 176423b1d3ae687a4c371f33cbb5b0c38b7655866a2e151e3d4fe615a16c8607
font_01_sfnt_off0000928b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x928B 19344 bytes
SHA-256: 2724155def9451154aaa40a73708cfb26fd726ec0b731530c35f05b5b7055da3

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