Malicious PDF — malware analysis report

Static analysis result for SHA-256 665e6c322f19e0ec…

MALICIOUS

PDF

46.6 KB Created: 2021-05-17 01:39:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 07b45c663189cb4b320c583ddf9c43ca SHA-1: 874b49cf2bfc6cfe5d049c22fbe15b9ba4bc13b7 SHA-256: 665e6c322f19e0ecf949bc677b8a8fbe0e186b751c95ecb706b2315bc307a760
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents a fake CAPTCHA or verification prompt to trick the user into downloading malicious content, as indicated by the 'SE_FAKE_CAPTCHA' heuristic. It also contains numerous embedded URLs pointing to sites offering game hacks and cheats, suggesting a lure for potentially unwanted or malicious software. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/roblox-studio-free-game-hack
    • http://arthakranti.org/images/hack-coin-master-apk-31_GM406889139.pdf
    • http://arthakranti.org/images/how-do-i-get-minecraft-for-free_GM479516143.pdf
    • http://arthakranti.org/images/minecraft-survival-hacks_GM479516143.pdf
    • http://arthakranti.org/images/real-robux-generator_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-free-spin-and-coin_GM406889139.pdf
    • http://arthakranti.org/images/roblox-hack-scripts-pastebin_GM431946152.pdf
    • http://arthakranti.org/images/minecraft-hacked-client-download_GM479516143.pdf
    • http://arthakranti.org/images/free-coin-master-hacks_GM406889139.pdf
    • http://arthakranti.org/images/roblox-com-robux_GM431946152.pdf
    • http://arthakranti.org/images/how-to-earn-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/todays-free-spin-and-coin-links_GM406889139.pdf
    • http://arthakranti.org/images/make-free-robux_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-free-coin-and-spin-app_GM406889139.pdf
    • http://arthakranti.org/images/free-robux-for-free_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-official-website_GM406889139.pdf
    • http://arthakranti.org/images/how-to-hack-roblox-2021_GM431946152.pdf
    • http://arthakranti.org/images/robux-hack-2021_GM431946152.pdf
    • http://arthakranti.org/images/minecraft-launcher-download-free_GM479516143.pdf
    • http://arthakranti.org/images/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://arthakranti.org/images/coin-master-hack-xyz_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b6.bin
f299e558cbc5ee3d001e9f74fb09125ee370f8b635c15dd862264ce298d40094		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B6 27168 bytes
font_01_sfnt_off00008642.bin
081569ec119746cc4db5e65c324be5d90361ff1f928a16f4e5d08db70348f444		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8642 3944 bytes
font_02_sfnt_off0000932c.bin
5fdc582f30145a96e28329e80bd45567e2bf6a1df475cf6931e13f95db6331fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x932C 18484 bytes

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