Malicious PDF — malware analysis report

Static analysis result for SHA-256 469c567e57d6fb7c…

MALICIOUS

PDF

50.0 KB Created: 2021-06-03 23:07:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a097c0b900bc65c938387c11518d5fe4 SHA-1: 488f3d18bd3621121d2b97974acc97bde02a9e83 SHA-256: 469c567e57d6fb7cd593e962f247fa8a20c170ddeecbf0c3eb6e1c435daa9143
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized links for game-related cheats and virtual currency. The presence of a direct link to 'netcdn.online' and the heuristic firing 'PDF_SEO_LINK_FARM' strongly suggest this document is part of a phishing or scam campaign designed to trick users into downloading malware or visiting malicious sites. No scripts were extracted, but the document's structure and embedded links indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 https://netcdn.online/app/431946152/free-robux-without-verification-game-hack
    • http://perpus.stmik-im.ac.id/repository/ways-to-get-robux_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/minecraft-pe-015-0-apk-free-download_GM479516143.pdf
    • http://perpus.stmik-im.ac.id/repository/download-coin-master-apk-hack_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/apps-to-get-free-robux_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/free-robux-website_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-change-your-name-on-roblox-for-free_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-links-app_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-change-roblox-name-for-free_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/coin-master-game-android-free-download_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/without-pokemon-go-free-incense_GM1094591345.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/earn-robux-for-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054cb.bin
5fbbd95308cd83bd83dcbbd69abe7d9406034ec458aada535e5c527334c95568		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54CB 32608 bytes
font_01_sfnt_off00009f2e.bin
5864977637737ef4e1bd5b7bfc66e5602b8aa3d3ed60f74fb5f96fd63c3aa8ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F2E 18964 bytes

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