Malicious PDF — malware analysis report

Static analysis result for SHA-256 731bc82826cd69f7…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 16:59:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 190c32880ea260ebb5fda8d5f11671bd SHA-1: 26bfd6eb4fbe0c95340d66a54f1db40964f1a4d9 SHA-256: 731bc82826cd69f784bb3df83c6d7573f1f777ad428ed3119168b17192eb8ccc
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 http://netcdn.tw/app/431946152/roblox-hack-download-pc-game-hack PDF link annotation
    • http://perpus.unbi.ac.id/slims7_cendana//repository/server-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/inmpact-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-tiktok-likes-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-free-robux-without-password_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/minecraft-cheats-switch_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/car-dealership-tycoon-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/can-i-change-my-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/robux-hack-apple_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/wearedevs-roblox-game-exploits-and-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/free-mouse-auto-clicker-for-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://perpus.unbi.ac.id/slims7_cendana//repository/android-coin-master-hack_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_off00002e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E31 22280 bytes
SHA-256: fe5dbf2e98876d00222ecffe4f05d6655fa165539fc476ffbcdb0736587f3e49
font_01_sfnt_off00005f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F71 19316 bytes
SHA-256: f7e1569b35dd9ea38dfb046f4486bccf47f5ffb509dcfc8bcbaa088fb7facdac

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