Malicious PDF — malware analysis report

Static analysis result for SHA-256 80eda6d923e4f2d1…

MALICIOUS

PDF

37.8 KB Created: 2021-05-11 14:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8a1df5cc166774f020c4c8a6c27eca83 SHA-1: 4ff739e17ee645eb949385aae57afd2517800d44 SHA-256: 80eda6d923e4f2d1c099db6f0748e577920d95991f1af0d4bab18f98beccbeb4
92 Risk Score

Malware Insights

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

This PDF document was flagged as malicious. It uses a fake-CAPTCHA lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 5

  • 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
  • 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/lazyblocks-com-free-robux-game-hack PDF link annotation
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E2 27044 bytes
SHA-256: 0aa9f9e53ac5bbf6042f1f46e8ac1081f93db74e0569401ef90dfdf6a80177a5
font_01_sfnt_off00007078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7078 19008 bytes
SHA-256: 000d85757c2dbc774c4a4ed19607b9025a632ba167ee8131c5b8e6d7f50f0f1c

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