Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa24bcc08713b67e…

MALICIOUS

PDF

46.6 KB Created: 2021-05-12 09:31:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4db81d649b1bf44116e9126f1b632917 SHA-1: 6b17e6ad9de675040414ab477a05b336208ce4f0 SHA-256: aa24bcc08713b67e223af99dfcaad14cce97fac1a808d92c2c987fa1e33117a1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document presents a fake CAPTCHA or human verification prompt to trick users into clicking a link, which is a common social engineering tactic. The embedded URL and numerous other URLs point to sites offering 'free Robux' or game hacks, suggesting a lure for potentially malicious downloads. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to lead the user to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/how-to-get-free-robux-no-human-verification-game-hack
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/huskybuckscom-free-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-version-download-2021_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/daily-spin_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/www-free-robux-com_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-club_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-human-verification_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-shield-hack_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/rbxoffer-com-free-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-robux-generator-2021_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/flip-master-free-coins_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-tool-pc_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-website_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-heaven-links_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/robux-websites-that-work_GM431946152.pdf
    • https://www.nrzroblox.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e8c.bin
8a8799ac17f6e92367d1b4db9851ac0778b90771330c01fca68aabaed110fb57		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E8C 24820 bytes
font_01_sfnt_off000087b2.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B2 2824 bytes
font_02_sfnt_off00009161.bin
add4238412854312c544fb77f8d10d54d15c3f72dfb550af23f9090805c2c756		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9161 19024 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.