Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c80567481ece3c3…

MALICIOUS

PDF

41.7 KB Created: 2021-05-16 07:06:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2bfb473fdb68cb81989c946ee4d2a651 SHA-1: dab9f3dcb231d09ccbe5a9e5e5dedb674c25e569 SHA-256: 4c80567481ece3c3f23b54e98f7e835e5f05972f6ef56959f90bf24b19df5cea
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of game hacks and generators to trick users into clicking malicious links. The presence of a fake CAPTCHA heuristic indicates an attempt to further obfuscate the malicious workflow and potentially trick users into executing further actions. The embedded links likely lead to further malicious content or exploit delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.xyz/app/406889139/cheat-codes-for-coin-master-game-hack PDF link annotation
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-daily-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-firebird-card-free_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://jasapembersihtoilet.com/ckfinder/userfiles/files/how-to-get-free-clothes-on-roblox-2021_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
stream_003_off00004a76.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A76 24104 bytes
SHA-256: afdd29ad1e20ca1cd42ae585793bf79da8a361d326c0a5430bbc3a0651e01747
font_01_sfnt_off0000815f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815F 18052 bytes
SHA-256: c83c2968f9adc9e8284b9f918c7c7a0f7d3bbc65ccd05c6284fac2f5c017bb12

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