Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f3d8fc24c81ffe…

MALICIOUS

PDF

33.9 KB Created: 2021-06-29 19:23:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ca50f4a976457b8b88c36af55eb0ffaf SHA-1: 1d6b53cab971cb754832ea7d6bb584b1533bb29a SHA-256: d6f3d8fc24c81ffe2b3efad7c1046da3ba9553258354d30e8f417dd356cc7c6f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of SEO-optimized links, many of which point to external resources related to game cheats and virtual currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly flagged this PDF as malicious. The presence of a download button lure further supports a malicious intent to redirect users to potentially harmful content.

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/hack-monedas-roblox-game-hack
    • http://digilib.stie-yppi.ac.id/repository/coin-master-70-spin-link-today_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/cool-hacked-weapons-roblox-script_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-change-username-free-no-waiting-robux_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/password-free-roblox-accounts_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-downgrade-minecraft-pe_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-easy_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-bloxburg-free-hack_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/hack-anime-cross-2-roblox_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-card-id_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/final-stand-roblox-cheat_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-bypass-roblox-anti-cheat_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/10-tips-to-get-free-robux_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/latest-free-spin-coin-master-daily_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-robort-free-mega-vip_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-robux-generator_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-come_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d4f.bin
41a4e124aa5579054da563d7ff6a124e292c8d39782e38a15bcb459ddd120153		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D4F 22440 bytes
font_01_sfnt_off00005f7e.bin
e8387f8ac07f8c95aad31639523ece77dbf31b7910692190f34a19a539a47360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7E 19028 bytes

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