Malicious PDF — malware analysis report

Static analysis result for SHA-256 17048c4039bfb6ba…

MALICIOUS

PDF

39.2 KB Created: 2021-05-23 20:55:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 082dc774382bb773b48e6bb4991867d8 SHA-1: a7bde699f33caa4477e9c9d82586984272c9ab4c SHA-256: 17048c4039bfb6bafcf93014c7c3c02e811401f824ec57701ed8265e9749eeaa
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure and a prominent call-to-action link to 'funblox.xyz', which is associated with a Robux generator scam. The presence of multiple embedded URLs, including one pointing to a potential download, suggests an attempt to trick the user into executing further malicious content or visiting a phishing site. No scripts were extracted, but the document's structure and content strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/funblox.xyz-free-robux-game-hack
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/minecraft-bedrock-download-pc-free_GM479516143.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/robux-gift-card-free_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/roblox-character-free_GM431946152.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-spins-coin-master-links_GM406889139.pdf
    • https://www.eisgroupme.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031d8.bin
a80cf498a934407ca9699147c5af5d1654c32e7fa8ab282b652750f3381eb401		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D8 26120 bytes
font_01_sfnt_off00006d48.bin
eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D48 2940 bytes
font_02_sfnt_off00007758.bin
094e3ad3acb05c69538296255af77c281e929786c4e47907665e7e86d1bfa11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7758 18416 bytes

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