Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8eed98630667eb8…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 20:57:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 514a97a7dc2619924734896b9fb8aa6b SHA-1: 53f56c2b3c2e547a47c7c9119c376d9fe259a89f SHA-256: b8eed98630667eb8bbb580203869c7980a4e1ff3bf3a1d0c2f240c87fa742605
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free in-game currency, indicating a social engineering attempt to redirect users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs further supports this assessment. No scripts were extracted, but the document's structure and content point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.tw/app/406889139/free-spins-coin-master-october-17-2021-game-hack PDF link annotation
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-roblox-promo-codes-november-2021_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/hack-roblox-fixed-pc-infinity-heroes-x100_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/how-to-get-free-robux-on-macbook-air_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/robux-win_GM431946152.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/tiktok-likes-free_GM835599320.pdfIn PDF document text
    • http://www.en.guofuhee.com/Public/upload/editorfiles/free-roblox-accounts-with-robux-2021_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_off000035b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B7 22952 bytes
SHA-256: cdb557a9f2e1b4d3515271283de10081f0eaa58ba3d3442a0c8e4dd15a6e6fbc
font_01_sfnt_off00006939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6939 18788 bytes
SHA-256: 65f4803c8f051d412bbbbbb7dd72e981990fef64dbb6576893c251839893721c

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