Malicious PDF — malware analysis report

Static analysis result for SHA-256 04689627499eb921…

MALICIOUS

PDF

40.5 KB Created: 2021-05-23 14:06:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 38060bfc9b4175f6f0765a9ac190178d SHA-1: 98662da39393f52267f5ad3461c53f9739329d31 SHA-256: 04689627499eb921389081df5c9171f6676c2046cb7c847ef3c19852e96cb230
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA and includes a call-to-action phrase, aiming to trick the user into clicking a link. The primary external URI, https://netcdn.xyz/app/406889139/coin-master-free-spin-link-today-2021-game-hack, along with other embedded URLs, suggests a lure for game-related cheats or scams. While no scripts were explicitly extracted, the ML classifier and fake CAPTCHA heuristic indicate malicious intent, likely leading to a second-stage download or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7718

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-spin-link-today-2021-game-hack
    • http://bogatyr.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://bogatyr.com/images/free-spins-for-coin-master_GM406889139.pdf
    • http://bogatyr.com/images/minecraft-pc-download-free-full-version_GM479516143.pdf
    • http://bogatyr.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://bogatyr.com/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003500.bin
d9518d786afbb339f6753935b0ef2c19defb50ef08847af780ab61a058a61757		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3500 25148 bytes
font_01_sfnt_off00006efb.bin
094dd0a0e5277ad3fac8c9ca7260e78f3cbfe09bbc23d6d8ea3c4bd1b8532ae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EFB 3480 bytes
font_02_sfnt_off00007b3f.bin
209d45ed87732d827821998a5283e56b95c39a3af4032faff2e6da7d3e76f78f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B3F 18812 bytes

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