Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a936d42d9dfbcb4…

MALICIOUS

PDF

43.1 KB Created: 2021-05-13 15:36:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d6d5a98a87d9ad0b9f3de97f14e0f0d3 SHA-1: 76fc0b7a047017ec9a21fb1cd0f82ec4159b14e2 SHA-256: 6a936d42d9dfbcb44f997235204183ca1018435b32ede9005db1a4774cf16436
82 Risk Score

Malware Insights

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

The document contains a fake CAPTCHA lure and an embedded URL pointing to a potential download. The ML classifier also flagged this PDF as malicious with high confidence. The presence of numerous URLs related to free in-game currency and items suggests a phishing or scam attempt designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-no-verification-or-survey-game-hack
    • http://jjpremiers.com/files/free-robux-app_GM431946152.pdf
    • http://jjpremiers.com/files/free-spins-coin-master-2021_GM406889139.pdf
    • http://jjpremiers.com/files/how-to-get-free-roebucks-without-verification_GM431946152.pdf
    • http://jjpremiers.com/files/free-spins-for-coin-master-app_GM406889139.pdf
    • http://jjpremiers.com/files/roblox-online-free_GM431946152.pdf
    • http://jjpremiers.com/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdf
    • http://jjpremiers.com/files/free-robux-just-enter-username_GM431946152.pdf
    • http://jjpremiers.com/files/lots-of-robux_GM431946152.pdf
    • http://jjpremiers.com/files/minecraft-realms-free-trial_GM479516143.pdf
    • https://www.jjpremiers.com/files/free-spins-coin-master-links-no-human-verification_GM406889139.pdf
    • https://www.jjpremiers.com/files/coin-master-get-free-spins_GM406889139.pdf
    • http://jjpremiers.com/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://jjpremiers.com/files/coin-master-free-coins-link-facebook_GM406889139.pdf
    • https://www.jjpremiers.com/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://jjpremiers.com/files/free-robux-redeem-codes-2021_GM431946152.pdf
    • http://jjpremiers.com/files/free-coins-and-spins_GM406889139.pdf
    • http://jjpremiers.com/files/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • https://www.jjpremiers.com/files/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • https://www.jjpremiers.com/files/easy-robux-today-com_GM431946152.pdf
    • https://www.jjpremiers.com/files/download-coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004996.bin
9d8ccb65522e623f7f17e6b2d2ff89c603f9c279b8818d766f21d06149bcfaf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4996 25420 bytes
font_01_sfnt_off00008455.bin
85e8471d4bb7809b16494b43ecc998cec7f87bafeaec38a3001510264e72f0e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8455 18892 bytes

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