Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ee2bb3b24bfce4…

MALICIOUS

PDF

34.5 KB Created: 2021-07-09 08:04:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dd36968394661d5023fae93395f615de SHA-1: 96b8b52a290d85963b1f8c89c83c3f9fac386411 SHA-256: d9ee2bb3b24bfce4e648efaa9daaae407c1a329ae56f35ab26eca724636f33fc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a primary external URL, 'http://netcdn.tw/app/431946152/freerubux-game-hack', which are indicative of a phishing or malware distribution attempt. The document body and heuristics suggest a lure related to free game currency or items, aiming to trick users into clicking these links. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/freerubux-game-hack
    • https://perpus.upp.ac.id/digilib/repository/free-spin-generator-for-coin-master_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-free-cards-link_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-robux-codes-no-verification-2021_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/bux-life-free-robux_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-minecraft-hosting_GM479516143.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-android-root_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/get-free-spins-coin-master_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/minecraft-hack-client-18-9_GM479516143.pdf
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/roblox-system_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/coin-master-hack-https-coinms-net_GM406889139.pdf
    • https://perpus.upp.ac.id/digilib/repository/how-to-hack-fairy-tail-ultimate-adventures-roblox_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/is-a-roblox-account-free_GM431946152.pdf
    • https://perpus.upp.ac.id/digilib/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • https://perpus.upp.ac.id/digilib/repository/how-can-you-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000315e.bin
c4476976bacd9e1fbb50ca9d6d1a552b3652e57f2b6de9f1366adffc7aa5ffc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x315E 22372 bytes
font_01_sfnt_off00006340.bin
a4910544a3301e21d5425f47d387c0dcd2b1454e32e0c532c02705c370365377		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 18572 bytes

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