Malicious PDF — malware analysis report

Static analysis result for SHA-256 c20bf9a3610b76ab…

MALICIOUS

PDF

44.3 KB Created: 2021-05-11 16:36:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d907cc1fea562164227c60448542ba57 SHA-1: 1e1f6c26aea6c7a33b374811b571142f6c48f767 SHA-256: c20bf9a3610b76ab77dbb620249b3def8e2ac6ab74306516da60fbd87716d1b8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 4

  • 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.
  • 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/431946152/roblox-avatar-com-game-hack PDF link annotation
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.stiks-tarakanita.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.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_off000049fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49FE 28708 bytes
SHA-256: a5e47b818a2b9ce38685f3cfbdd0043b5ac68286d6bfd68f324a9cc33e8bfa75
font_01_sfnt_off00008a18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A18 18492 bytes
SHA-256: 0bfbb41744fd3891f32c18381ea8358331ecc6352836a5a8663314898f67b625

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