Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcd38c7c1333ea9…

MALICIOUS

PDF

35.7 KB Created: 2021-07-05 22:34:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3f734058cf4efc05c516062cb1a51cec SHA-1: 2856a875802a5e21c1cb9a2441672d6e95aefa25 SHA-256: 9bcd38c7c1333ea9dd2329ab9afbb2c588efd3b9f20c44aa4641f1295e22b60b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links that redirect to websites offering game hacks and free in-game currency, such as 'Coin Master' and 'Roblox'. The primary heuristic indicates these links lead to a 'game hack' redirector, suggesting a lure to malicious sites. While no scripts were directly extracted, the PDF structure and embedded URIs strongly imply a social engineering tactic to drive users to potentially malicious external resources.

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-reward-links-game-hack PDF link annotation
    • http://digilib.unbari.ac.id/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-more_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-shinobi-life-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-genenger_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/games-in-roblox-that-give-you-free-stuff_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-free-robux-just-by-inspecting-it_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-100-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-noclip-hack-no-cheat-engine_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-2021-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/synapse-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/best-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/hao-hack-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-bank-tycoon-free-vip_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_off00003332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3332 23164 bytes
SHA-256: 80d753f416023b5b3f8999ab00fcd2b92db1453a66549008baff645541ad8328
font_01_sfnt_off00006799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6799 18680 bytes
SHA-256: 1f410b421e14c3c9fbf7e9bbfeefe584f4a56fc2fc275a58efc280a6e8be8f92

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