Malicious PDF — malware analysis report

Static analysis result for SHA-256 8615ce60521b7586…

MALICIOUS

PDF

48.0 KB Created: 2021-06-03 06:34:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf84d8fe04dd8be15ec31d960df39c58 SHA-1: 4f8789cdeb2f53340a39c0a4ea369c6b35f7700d SHA-256: 8615ce60521b7586b335615721868f12c603872765d8ea454bdef024fdd4c9dc
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 0.9796

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 https://netcdn.online/app/431946152/how-to-get-free-robux-without-email-game-hack PDF link annotation
    • http://e-library.smkn1jombang.sch.id/repository/free-spins-for-coin-master-that-work_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/pubg-uc-carding-website_GM1330123889.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-card-hack-app_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-tiktok-hands-free_GM835599320.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://e-library.smkn1jombang.sch.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005380.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5380 24724 bytes
SHA-256: cf0d27733f6202b8254f71436079286aa76ab79d1fa2aeda13468295545a7376
font_01_sfnt_off00008c40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C40 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off00009600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9600 19328 bytes
SHA-256: 2bb545c14ce80967bc964a539ce1fba7d75b9199f0e299556cda79647f99e488

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