Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b4056ead860038…

MALICIOUS

PDF

45.8 KB Created: 2021-05-11 04:03:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 968157882a66c59bfb2ac932be5a1e90 SHA-1: c363154e3f8334d7d4854ae46ecb8196562a42c7 SHA-256: 18b4056ead86003897390c55a4400c149f2fba8a324cf18970997c1b95eaef4e
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The embedded URL, https://netcdn.xyz/app/431946152/can-you-actually-get-free-robux-game-hack, likely leads to the download of a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/can-you-actually-get-free-robux-game-hack
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/jailbreak-script_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/easy-robux-today-com_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/minecraft-free-online_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/how-to-get-free-robux_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/best-free-roblox-outfits_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/free-roblox-card_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/coin-master-free-box_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-hacks-2021_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/redeem-roblox-card-free_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/earn-roblox_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/roblox-hack-2021_GM431946152.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/coin-master-hack-2021-no-human-verification_GM406889139.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id/repository/minecraft-education-edition-free_GM479516143.pdf
    • https://digilib-ppkn.stkip-pgri-sumbar.ac.id//repository/free-card-collection-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b5a.bin
2194ffb16183013e73d01f9b6de11044a9cd19857977bfd20ad5efca2ee106ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B5A 25052 bytes
font_01_sfnt_off00008520.bin
c2578a292634a901613c1dd9f9883dd4930e6811e59ae03d696f263e56ea17b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8520 2892 bytes
font_02_sfnt_off00008f0a.bin
47da03a4981b0a54a8018003304e59ec7e3f87382350c48cbaac3b3d81608ccf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0A 18764 bytes

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