Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3d076b0982a819a…

MALICIOUS

PDF

36.5 KB Created: 2021-06-18 12:56:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 940a34e4d518635d08ae4dca1aee635b SHA-1: a2205ff35c5d9eb33fc1c976d8a6d36520e5f189 SHA-256: d3d076b0982a819a35d4a8491d580d13ae68271fd08975e89d60d5a545e3ea73
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and text that promote free in-game currency and items for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users with deceptive offers. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern is likely to be phishing or directing users to sites that host malware, disguised as legitimate offers.

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.co/app/431946152/how-to-get-free-roblox-card-codes-2021-game-hack
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/robux-for-free-2021-no-vertification_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/coin-master-free-spins-link-today_GM406889139.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-coins-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-mods-for-minecraft-pe_GM479516143.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-robux-hack_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-on-phone-no-verification_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-hack-apk_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/minecraft-apk-download-v1-144-2-free_GM479516143.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/earn-free-robux-for-roblox_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-working-2021-phone-easy_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-promo-codes-2021_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-hack-us_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-robux-exe_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/tiktok-minecraft-hacks_GM479516143.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-minecraft-server_GM479516143.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-on-roblox-ipad-2021_GM431946152.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/free-spin-coin-master-2021-link_GM406889139.pdf
    • http://perpustakaan.fksb.unismabekasi.ac.id/katalog-buku/repository/roblox-bird-simulator-hack-script_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034b8.bin
ea36ceae4e23e327e0a54d1652d67714b0c4ec6a8f9036de5f965a11aa9ea0c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34B8 22928 bytes
font_01_sfnt_off00006805.bin
85e1a072f55eb4fe5da8e8ec65be519260bc92136ca01880103cdd2114dcdda1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6805 19496 bytes

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