Malicious PDF — malware analysis report

Static analysis result for SHA-256 b289d476427499c8…

MALICIOUS

PDF

45.3 KB Created: 2021-05-15 02:06:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a6453a0dbf66700282128c0fa2895762 SHA-1: 1105abdaad0d05ce9ccfbde9744ce1d248c5b42c SHA-256: b289d476427499c832ee0a513ddcd6f4c36158697e8b3ad7313da5c63b0f45b0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, a common tactic to trick users into interacting with malicious content. It also embeds external URIs, such as 'https://netcdn.xyz/app/431946152/free-robux-no-verification-2021-game-hack', which likely lead to further malicious downloads or phishing pages. The presence of these elements strongly suggests a social engineering attack aimed at compromising the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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-2021-game-hack
    • http://briankellyforcongress.com/images/cheats-coin-master-free-spins-and-news_GM406889139.pdf
    • http://briankellyforcongress.com/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://briankellyforcongress.com/images/get-free-spins-link-in-coin-master_GM406889139.pdf
    • http://briankellyforcongress.com/images/free-minecraft-realm-codes_GM479516143.pdf
    • http://briankellyforcongress.com/images/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://briankellyforcongress.com/images/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdf
    • http://briankellyforcongress.com/images/free-robux-real-working_GM431946152.pdf
    • http://briankellyforcongress.com/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://briankellyforcongress.com/images/blogspot-coin-master-spins_GM406889139.pdf
    • http://briankellyforcongress.com/images/promo-codes-for-free-robux_GM431946152.pdf
    • http://briankellyforcongress.com/images/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://briankellyforcongress.com/images/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://briankellyforcongress.com/images/free-robux-hack_GM431946152.pdf
    • http://briankellyforcongress.com/images/robux-generator-that-works_GM431946152.pdf
    • http://briankellyforcongress.com/images/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://briankellyforcongress.com/images/roblox-login-hack_GM431946152.pdf
    • http://briankellyforcongress.com/images/minecraft-pocket-edition-free_GM479516143.pdf
    • http://briankellyforcongress.com/images/free-spins-coin-master-2021_GM406889139.pdf
    • http://briankellyforcongress.com/images/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://briankellyforcongress.com/images/free-robux-site_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048e2.bin
7ef400ddc8e9b3c90fe2b86883dde7640fa788c1187d0905d5fadfc2dd181c7b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48E2 25020 bytes
font_01_sfnt_off00008293.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8293 2832 bytes
font_02_sfnt_off00008c44.bin
d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C44 19004 bytes

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