Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d3c8061b7d1e327…

MALICIOUS

PDF

46.7 KB Created: 2021-06-09 16:58:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: abf352688db0c8ac8ecf4d5d05dc2036 SHA-1: edbf11a95aeecce897c2e1e15595801d50ef7a41 SHA-256: 8d3c8061b7d1e327dad0b56cb7f3b2969b957c4894c663cff0af8c024efec7db
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with a malicious link. The embedded URI points to a URL that promises game-related hacks, suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a likely attempt to redirect the user to a site that may host further malicious content or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.tw/app/431946152/how-to-get-free-gift-cards-roblox-game-hack
    • http://gruporamos.do/images/how-can-i-get-robux_GM431946152.pdf
    • http://gruporamos.do/images/coin-master-hack-2021-ios_GM406889139.pdf
    • http://gruporamos.do/images/cool-free-green-shirts-roblox_GM431946152.pdf
    • http://gruporamos.do/images/coin-master-today_GM406889139.pdf
    • http://gruporamos.do/images/free-pants-in-roblox_GM431946152.pdf
    • http://gruporamos.do/images/can-i-download-minecraft-for-free_GM479516143.pdf
    • http://gruporamos.do/images/free-minecraft-maps-pe_GM479516143.pdf
    • http://gruporamos.do/images/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://gruporamos.do/images/saber-simulator-roblox-hack_GM431946152.pdf
    • http://gruporamos.do/images/hack-coin-master-ios-download_GM406889139.pdf
    • http://gruporamos.do/images/get-free-minecraft-account_GM479516143.pdf
    • http://gruporamos.do/images/minecraft-bedrock-hacks-windows-10_GM479516143.pdf
    • http://gruporamos.do/images/free-robux-no-generator_GM431946152.pdf
    • http://gruporamos.do/images/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://gruporamos.do/images/robux-hack-tools_GM431946152.pdf
    • http://gruporamos.do/images/roblox-hacker-melden_GM431946152.pdf
    • http://gruporamos.do/images/robux-generator-hack-2021-xonnek_GM431946152.pdf
    • http://gruporamos.do/images/minecraft-pc-free_GM479516143.pdf
    • http://gruporamos.do/images/free-spins-on-coin-master-links-2021_GM406889139.pdf
    • http://gruporamos.do/images/free-tiktok-accounts-and-passwords_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004d12.bin
dfb06fdad86b43bf7b275765386b5371c187afa43220ad413444592b539c5678		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D12 26924 bytes
font_01_sfnt_off0000886c.bin
94c1b019735d7e491765340abe50b2897410e2ec65ecf141c08bd9f2220897c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x886C 2824 bytes
font_02_sfnt_off0000921b.bin
39f24cf301ada6e83815b72f1960c04f1613d50b82df2eaa4aa4427acfb1265d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x921B 18740 bytes

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