Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b55f81eae6e54d8…

MALICIOUS

PDF

36.3 KB Created: 2021-05-22 07:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0c56a760b69f3bd2f5c116da43904f42 SHA-1: c8adfb71af55ad552e94221b615647958ffc3681 SHA-256: 4b55f81eae6e54d815cdedb482ae0a497ac95fa37882a95e4272a06defd76f85
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document employs social engineering lures, specifically offering "Free Roblox Hack" or "Free Minecraft" to entice users. It presents a fake CAPTCHA or MFA prompt, a common tactic to trick users into executing further actions or providing sensitive information. The document contains multiple links to external websites, some of which are likely part of the malicious chain, directing users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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/free-roblox-hack-game-hack PDF link annotation
    • https://gobeepbeep.co.uk/media/storage/editor/files/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://gobeepbeep.co.uk/media/storage/editor/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.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_off000032a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32A9 24920 bytes
SHA-256: 92846185700bafb497c180f45462b7f4cab5302b8be2efd678425ee480b7ac94
font_01_sfnt_off00006c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C82 18344 bytes
SHA-256: 9d921b2eee93f33e2efc5c53c848117e08d630d06cf868d7193b51dd4894dd93

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