Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc3d06586043934…

MALICIOUS

PDF

42.6 KB Created: 2021-05-21 20:43:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9bbef04e9f2bb5a1765de7c732eb9763 SHA-1: c81c1e02983c5405d231448ed655ad1e2a6c8a21 SHA-256: 9cc3d06586043934883f36d00f3880318e5d35a630e120eccd74071c27bc6afa
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, which is a common social engineering tactic to deceive users into interacting with malicious content. It also embeds multiple URLs that likely lead to further stages of the attack, such as downloading malware or redirecting to phishing sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9541

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/roblox-apocalypse-rising-hack-game-hack PDF link annotation
    • https://donrazvitie.ru/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/free-robux-no-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://donrazvitie.ru/images/best-free-robux-sites_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
font_00_sfnt_off000033f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33F4 34564 bytes
SHA-256: a59c2cce05381b41dfa504c4ecf1287b26296bff80ba61dc010532100b3408ea
font_01_sfnt_off00008384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8384 18948 bytes
SHA-256: c81671b47ab5e7fd402c3d16699df98b51b9b699798839031d1ff55305a8bd80

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