Malicious PDF — malware analysis report

Static analysis result for SHA-256 53f3b455bc295235…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 13:07:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ff1afbb690ab6726f57b812126edb7aa SHA-1: b0e0770e6087457cca6c33f1f2c2697b7655ddf6 SHA-256: 53f3b455bc2952351edaf247ea5fa5ca80abc8d9936e582882aea7e1480c2c6d
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses 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 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.
  • 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
  • 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.tw/app/431946152/get-free-robux-2021-game-hack PDF link annotation
    • https://library.elkatarie.ac.id/repository/free-robux-t-shirt_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-download-app-verification-hack_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-robux-legaly-without-paying_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-hack-to-get-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-hack-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-2-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-snowman-package-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/frozen-to-denth-in-roblox-games-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/cafe-on-roblox-studio-milkshake-set-free_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/descargar-asshurt-v32-hack-para-roblox-torrent_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/comment-faire-si-on-a-ete-hack-sur-roblox_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/roblox-xbox-one-free-download_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-roblox-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-robux-virus_GM431946152.pdfIn PDF document text
    • https://library.elkatarie.ac.id/repository/free-coin-master-spin-generator_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_off00002f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F91 22032 bytes
SHA-256: 9cecddcc858f769805067a1cc33f0eac2a43cfb7fd253aa0b448d12a12b93d1e
font_01_sfnt_off00006043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6043 19224 bytes
SHA-256: 821bcaeb5baca65cbb25255ca6205972482cf4d6c0082e9a42268983cc7c06a1

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