Malicious PDF — malware analysis report

Static analysis result for SHA-256 067926cbe9a5f5f2…

MALICIOUS

PDF

42.7 KB Created: 2021-05-17 22:31:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 83643d689c0923e0b6e2dd525adf62e7 SHA-1: d676d89fe9094c15cf002a950b26334cd963ec45 SHA-256: 067926cbe9a5f5f2066dbd652023722ddd8f08f8aef9704fa2dd18b7d92d326a
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URLs and document body content strongly suggest a lure for game cheats or in-game currency. While no scripts were directly extracted, the PDF structure and heuristic firings indicate malicious intent, likely leading to a second-stage download or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-free-cards-link-2021-game-hack PDF link annotation
    • http://no-no-gos.de/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/get-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/youtube-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/coin-master-hack-spin-160-pro_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://no-no-gos.de/images/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://no-no-gos.de/images/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B3 29828 bytes
SHA-256: a527acd0ae2101afed8f49ef1d19adeb1a300947facd70407a24771f2373347d
font_01_sfnt_off00008405.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8405 18456 bytes
SHA-256: b51790488d60a3c79421cfddad0a6ae9f074b26b8d27a704dda1d2d7bad48ec0

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