Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d332c91aeab51a0…

MALICIOUS

PDF

41.4 KB Created: 2021-05-11 15:35:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1bc26cb3640f1c13098f333212590b36 SHA-1: 91984bd5710a6c4eee1aa20a681a7420fef96392 SHA-256: 3d332c91aeab51a0537bff0dbfc8b5baaabf29473e1e39654bcb0d3d1ac81d95
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 malicious links. The embedded URLs point to external resources that likely host further malicious content or applications. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/hack-coin-master-apk-mod-game-hack
    • http://mou16-murmansk.ru/images/free-links-to-coin-master_GM406889139.pdf
    • http://mou16-murmansk.ru/images/coin-master-free-spins-and-coins-link-today_GM406889139.pdf
    • http://mou16-murmansk.ru/images/robux-hack-me_GM431946152.pdf
    • http://mou16-murmansk.ru/images/how-to-downgrade-minecraft-pe_GM479516143.pdf
    • http://mou16-murmansk.ru/images/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://mou16-murmansk.ru/images/coin-master-hack-2021-no-survey_GM406889139.pdf
    • http://mou16-murmansk.ru/images/jailbreak-roblox-hack_GM431946152.pdf
    • http://mou16-murmansk.ru/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdf
    • http://mou16-murmansk.ru/images/how-do-you-earn-robux_GM431946152.pdf
    • http://mou16-murmansk.ru/images/how-to-get-free-minecoins-in-minecraft_GM479516143.pdf
    • http://mou16-murmansk.ru/images/free-links-coin-master_GM406889139.pdf
    • http://mou16-murmansk.ru/images/coin-master-hack-spins-apk-download_GM406889139.pdf
    • http://mou16-murmansk.ru/images/free-coins-for-coin-master_GM406889139.pdf
    • http://mou16-murmansk.ru/images/coin-master-generator-free_GM406889139.pdf
    • http://mou16-murmansk.ru/images/how-to-get-free-roblox-items_GM431946152.pdf
    • http://mou16-murmansk.ru/images/roblox-rewards_GM431946152.pdf
    • http://mou16-murmansk.ru/images/actual-free-robux_GM431946152.pdf
    • http://mou16-murmansk.ru/images/card-hack-in-coin-master_GM406889139.pdf
    • http://mou16-murmansk.ru/images/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://mou16-murmansk.ru/images/give-me-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047c9.bin
3c1198cdaeb84ac5a9a8fc1aebddfb95931ed4f89b2c29a13ef9da7c278c2b03		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C9 24584 bytes
font_01_sfnt_off00007fd3.bin
9a1fe8593802629ca91e824aef9790fcb981ac5ee6ac3e1bb8e6d1b292261c5d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD3 18068 bytes

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