Malicious PDF — malware analysis report

Static analysis result for SHA-256 d00831e457c93fbc…

MALICIOUS

PDF

37.9 KB Created: 2021-05-21 15:06:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b83ee21c514a77bc687cd590df8ca055 SHA-1: c697476112bba27a8ac435796d63c9b1fb10711e SHA-256: d00831e457c93fbc69ceb3b1e684cc50a5d7a79421cc276d5c7b2ee5f4bd30e3
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a call-to-action to download a 'Robux Hack'. It embeds multiple URLs, including one pointing to 'netcdn.xyz' which is likely the primary download source for a malicious payload. The document's content and heuristics strongly suggest a social engineering attempt to trick the user into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/robux-hack-no-verification-game-hack PDF link annotation
    • http://safwafurniture.com/images/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://safwafurniture.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://safwafurniture.com/images/free-coin-master-spins-blog_GM406889139.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_002_off0000327a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x327A 27456 bytes
SHA-256: dcc1cbade61940c66694895bdf1fbaea831e698d8d8cee5b14fd4a002c31067e
font_01_sfnt_off000071fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71FC 18604 bytes
SHA-256: 770f8f6a3c3ea9ac3c319881d9f8005aae44889e6d1fc0dc42f8814bbcec8619

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