Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eca30312e81e889…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 11:38:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: fb0bbf7494fce0b1b7caac2fd775f43a SHA-1: 1044c7306f6dbc68335958c17bb6c8fa9ea9f3fc SHA-256: 8eca30312e81e8899e7c584e4b628c523bee611382cf3ba5e349da57216ba304
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA 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 0.9865

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/roblox-land-free-robux-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/www-coinmaster-com_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f83.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F83 27208 bytes
SHA-256: 92a84ababc61de63475f097c3d239c02c090a6653aa4e50583349a7b787f345c
font_01_sfnt_off00008c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C11 18492 bytes
SHA-256: dd1922fe1cc281356c7e312f91778e191ebdc244bf13f8823862483f595251c7

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