Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d88b2c17c99bff6…

MALICIOUS

PDF

44.2 KB Created: 2021-05-12 12:31:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d84062a33df2a938c39e56bff3bea09e SHA-1: d4e5c102fa8b2dfccd46dbb6a5cbe90a8dd1174b SHA-256: 0d88b2c17c99bff6488aa55d419149c082886e7b6c30f8d297b427f1b8a6b5c1
142 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious lure, employing a fake CAPTCHA to trick users into interacting with embedded links. The document contains a large number of external links, many of which point to scam-related content such as 'free Robux' or game hacks. The ML classifier strongly flagged this PDF as malicious, supporting the assessment that it is designed to lead users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • 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/get-free-robux-com-game-hack
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-no-survey_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/best-free-minecraft-servers_GM479516143.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/can-u-get-free-robux_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-robux-hack-generator_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-iphone_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-gift-link_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-robux-survey_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-pc-game-free-download_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-robux-generator-2021_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/hacks-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-computer_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/wurst-mc_GM479516143.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-links-2021_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-with-facebook-login_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/real-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bda.bin
4181d47fc7df870acce55cd10635bfb86a9f4c1c1e89659908ca2e525c0ccc21		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BDA 26824 bytes
font_01_sfnt_off00008a39.bin
2d8882c6a342abc4889e46f94bfee9f8cbf5538b2f5dc41d172000db9622f481		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A39 18376 bytes

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