Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfaa84c9aa484e8f…

MALICIOUS

PDF

35.6 KB Created: 2021-07-03 21:54:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4cdd1f5417255ac6b601b23cb10d2416 SHA-1: c5679b5d0751279c7080d3d3e2f118aeebb04b81 SHA-256: bfaa84c9aa484e8f6a7842a8b51f747916b8ea86ed37b78e95a31f945c693b47
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/how-to-get-free-robux-no-verification-2021-game-hack PDF link annotation
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/all-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-robux-2021-generator_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/robux-boost_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/hack-download_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app-for-iphone_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://elearning.manuputrabpc.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_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_off000032d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D2 22240 bytes
SHA-256: c6d07e293ec4c56a80c35459f738e14b9ed94e06ccd42970bc3f28eddf2dc9eb
font_01_sfnt_off00006456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6456 19640 bytes
SHA-256: daa201838bdbf48b85e104a71e58172e46eb57685cc2d98453f7e8ceecfd16ef

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