Malicious PDF — malware analysis report

Static analysis result for SHA-256 1db4cfd9390125ce…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 06:13:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3063efbd57ff34072df72e0eebe70fb0 SHA-1: 7a523e265913d59cade9df8a2004d16d4a045afd SHA-256: 1db4cfd9390125ce8e68049aca623cfff4172746603e7f03950d19b486bd93f3
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/406889139/coin-master-free-spin-and-coin-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-robot-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/adf-ly-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-trolling_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/pokemon-go-free-ultra-balls_GM1094591345.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-items-catalog_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.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_off00003023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3023 22248 bytes
SHA-256: 8dd45a2195d44fad2f8b5e9ab23564b5a247d176be84aee93225867c0d401782
font_01_sfnt_off00006159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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