Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90a6deb5ee6e64b…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 22:50:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cef55ec68ef2140d70c93e8d3f6f23d3 SHA-1: 4e2bcabf9ccb1533de0df09c907f3f1dce98936f SHA-256: d90a6deb5ee6e64be26824eb35ba1abc682128a9b9b567986c16d6c3fd3aa228
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 0.9865

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/daily-free-spins-coin-master-game-hack PDF link annotation
    • http://library.umuslim.ac.id/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-online-free_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/tiktokexe-free-download_GM835599320.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-ios-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.umuslim.ac.id/repository/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://library.umuslim.ac.id//repository/minecraft-games-free-to-play-online_GM479516143.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_off000051d9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51D9 25900 bytes
SHA-256: a754ef90bce9d00110177555682873bd33e1f4f5d98a748605edfa4a8a285b55
font_01_sfnt_off00008c35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C35 18308 bytes
SHA-256: 814bd0a2b88bdef89f3245e401f7fc464bd7314e61fe604409dcfddce4500050

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