Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8bf40cfc2faf33f…

MALICIOUS

PDF

35.3 KB Created: 2021-07-06 04:23:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b90523e56dcbf46728e533a0e9fc9848 SHA-1: 94751dab831916f9c1e1215b6d06b42ce5aa6019 SHA-256: d8bf40cfc2faf33fd73719aef23351be42f0894b7ca3bfe1180279a1be5ababa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous embedded URLs, many of which are part of a link farm designed to attract users searching for game hacks and free virtual currency. The document body and extracted URLs suggest a lure for popular games like Coin Master and Roblox, likely leading to malware downloads or phishing sites. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious lure.

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/406889139/free-spin-link-coin-master-game-hack
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/coin-master-hack-version-2021-download_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/free-robux-for-kids-that-can-hack-it_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-minecraft-server-hosting-with-plugins_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-roblox-money_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/free-roblox-hacks-no-download-2021-unpatched_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/roblox-april-fools-hack-roblox-blog-post_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/robux-incinerator-win-free-robux_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-robux-exe_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/pokemon-go-free-3d-model_GM1094591345.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/adidas-roblox-shirt-free_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/blox-fun-info_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/roblox-hack-ro-ghoul_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-fun-hack_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/code-roblox-free-items_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/win1code-free-robux_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/minecraft-dungeons-free_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/como-hackear-roblox-movil_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/free-robux-pins-2021_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/coin-master-free-spins-link-download-apk_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003283.bin
e7fb078f3807bd94cfe980b5a69e7828525e936aff033667f1e15a0952e17a6b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3283 23348 bytes
font_01_sfnt_off00006731.bin
05274da8f0b2c24f990b03f912799dd404877cbb0fa71ac5363d7c288192e7fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6731 18344 bytes

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