Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c569d4a4d64c01…

MALICIOUS

PDF

36.2 KB Created: 2021-07-01 09:12:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6e0ea145f0e763a66ceba5f3e6f7588f SHA-1: 1b37be779e89235dfa281c21a1a5cc4858330acc SHA-256: 55c569d4a4d64c01b3d0115d15a51b50f1e57df34d04c0b2e152549d488a3a89
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure and a clipboard-command (paste-and-run) lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/how-to-hack-roblox-accounts-september-2021-game-hack PDF link annotation
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-easy-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/3-roblox-games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-boat-ride-roblox-funneh_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/june-29-coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-coin-app_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/exploit-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/free-roblox-toy-redeem-code_GM431946152.pdfIn PDF document text
    • https://goianiamoveis.com.br/ckfinder/userfiles/files/coin-master-hacks-for-spins_GM406889139.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_off000032a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A2 22792 bytes
SHA-256: afd9aa01fd2eac88e285ff08a9b47fa4cc5ad674e2f2ee0bbfa95829ec7b1249
font_01_sfnt_off000065bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65BF 19904 bytes
SHA-256: fa4ae76e55ed7d1b95f479b756f81c66d381d227c26679b8b22167a072cc976b

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