Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f6dbd46d75f481…

MALICIOUS

PDF

49.2 KB Created: 2021-06-03 06:10:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d112cce66a35cb6cf47507ab6c5ea648 SHA-1: ca1bf20a29512cc79d14e7cbdb302bac05dd6ee3 SHA-256: 83f6dbd46d75f48154481489c783a5737f6930902fa502753d040b67bc595aed
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 0.9796

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.online/app/406889139/free-spins-coin-master-march-2021-game-hack PDF link annotation
    • http://lib.akpnbahtera.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/game-hunters-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/static-moonactive_GM406889139.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://lib.akpnbahtera.ac.id/repository/coinmaster-free-cards_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_off000051e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E5 30864 bytes
SHA-256: 5c749105f72f681250d0b9c97fe5e14ffb5a4b40e3a32aea0235347b0905c28d
font_01_sfnt_off00009226.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9226 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off00009d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D49 18452 bytes
SHA-256: f9f67c77da0d65153792dedd850da678f3a8682f9327ac55251990d25044da35

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