Malicious PDF — malware analysis report

Static analysis result for SHA-256 3294e70969d37623…

MALICIOUS

PDF

37.3 KB Created: 2021-05-22 12:40:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d6af70c6d397b499d746b987af296f25 SHA-1: 09c8cf4baaa85df90bed3a5f4e5c0728501f7cc3 SHA-256: 3294e70969d37623821a7b4fccaafa44dd61a5739eccdc7217ce33e3106eb17b
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or human verification prompt, a common social engineering tactic to trick users into interacting with malicious content. It contains multiple links to external websites, one of which is directly associated with a fake download for popular games like Minecraft and Robux. The presence of these links and the fake CAPTCHA strongly suggest an attempt to deliver a malicious payload or redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

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/479516143/minecraft-apk-free-download-0.16-0-game-hack
    • https://marstechmedical.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://marstechmedical.com/uploaded_files/userfiles/files/robux-hack-tools_GM431946152.pdf
    • https://marstechmedical.com/uploaded_files/userfiles/files/minecraft-free-minecoins_GM479516143.pdf
    • https://marstechmedical.com/uploaded_files/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdf
    • https://marstechmedical.com/uploaded_files/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdf
    • https://sigmaclient.info#2
    • https://flux.today#3
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003514.bin
b02f578b9f18b9a390e03b862d9af2ae7d169626952ab7c5176f7e7bb93006bf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3514 24932 bytes
font_01_sfnt_off00006dd8.bin
143cdc4e5324f1572c7170c4fe37a033449aea51cdd3ec4d91b7fb0cb62456a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 19148 bytes

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