Malicious PDF — malware analysis report

Static analysis result for SHA-256 27d6b05af99adad2…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 07:13:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 5da38b1515de4c0c05d63b5449251aa0 SHA-1: 90bc163bc2cbee97f1e33a90e3a3c54a867f9fd6 SHA-256: 27d6b05af99adad2ee50a12f40bc2a5c621645abc323da812ba591d784f606c1
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 0.9864

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/coin-master-hack-apk-free-download-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/is-tiktok-app-free_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/tiktok-likes-for-free_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pubg-uc-shopee_GM1330123889.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-game-hack-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-tiktok-fans-no-human-verification-ios_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-today_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
stream_004_off00004f8b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8B 28020 bytes
SHA-256: 837c2694168960bfa1fcbbef096c14465e261fde0600f7c7b36960e383f6181c
font_01_sfnt_off00008efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFB 18636 bytes
SHA-256: 9aef5eba1b944da03ad0d0211b0df86da0d90e0cf099764a6ba9c9a2ed29eb67

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