Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed3b64a27e04a4b3…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 20:11:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 2a193753e19bd41d4fb57cb04b7af8e5 SHA-1: 74f92aab49fb4fb19c4694e2d59e5713ce61dc7c SHA-256: ed3b64a27e04a4b35b3cc4b53117f9ae4a6d424b7930caa23424c0a664283fcc
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-hack-without-human-verification-game-hack PDF link annotation
    • https://perpustakaan.stami.ac.id/repository/roblox-free-gamepass-v3rmillion_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/robux-free-online_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/roblox-t-shirt-size-free-shipping_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/20210-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/how-to-get-xp-in-pokemon-go_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stami.ac.id//repository/microsoft-roblox-rewards_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_002_off000033bf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BF 23700 bytes
SHA-256: 66095d66f23eec56a33c35302cc323dd87738c8577382291b0587c9e2b2f537e
font_01_sfnt_off00006918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6918 18904 bytes
SHA-256: 2b59a93daaa5c621716151829f81455d75a870d677e7060bc76b17460129e809

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