Malicious PDF — malware analysis report

Static analysis result for SHA-256 7920909e2a3d1c8a…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 08:12:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f3ce4aae1a26a2638fb85c42d7d25f6f SHA-1: a740c298e8fefb90713a6d6423c02914fcebd754 SHA-256: 7920909e2a3d1c8ae70cf28689c966a3ddbd460560c5a51488d3a7daf22c3a91
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 to trick the user into interacting with it, likely leading to a download. The embedded URL and numerous other URLs point to sites offering game cheats or hacks, suggesting a lure for downloading malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.online/app/431946152/free-free-robux-game-hack
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-accounts-for-sale-free_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-mobile-hack_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/lastrick-com-coin-master-hack_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-hack-without-verify_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/http-blackgamesus-coinmasterhack_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-ad_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-free-spin-whatsapp-group-link_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/robux-for-offers_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/coin-master-hack-2021-apk-download_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/john-doe-roblox-hacker_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/pokemon-go-free-yawn_GM1094591345.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-games-free_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/roblox-robux-hack-generator_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/cute-free-roblox-clothes_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/hacks-and-cheats-for-coin-master_GM406889139.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/tiktok-download-free-jio-mobile_GM835599320.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/rblx-gg-free-robux_GM431946152.pdf
    • http://www.majdoorkalyansamiti.org/uploaded_files/userfiles/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005307.bin
82c4bccf04bc7b67a2bce91d12329909098d447e78b0a9ffcac18afb88e96060		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5307 26476 bytes
font_01_sfnt_off00009141.bin
3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9141 18012 bytes

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