Malicious PDF — malware analysis report

Static analysis result for SHA-256 0664e085e0e6ebaf…

MALICIOUS

PDF

32.5 KB Created: 2021-06-19 09:16:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9dfa9755a6ca84fc20eea45d3dcca69a SHA-1: 36b6f865e75746c40004de3ba320ef2df99f0769 SHA-256: 0664e085e0e6ebaf9da7ad111cd6501fb9c655baf8455d9e5ea99a266cc58922
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and a call-to-action phrase, 'CLICK HERE TO ACCESS ROBUX GENERATOR', designed to trick users into visiting malicious websites. The primary URL, http://netcdn.co/app/431946152/free-robux-watch-add-to-get-robux-game-hack, is associated with a 'free generator / game hack' lure, indicating a phishing or scam attempt. No scripts were extracted, but the embedded URLs and the nature of the lure suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/free-robux-watch-add-to-get-robux-game-hack PDF link annotation
    • https://key8013805.com.tw/upload/files/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/collect-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-games-that-give-you-free-robux-no-password_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-tool-no-human-verification_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-hack-robux-on-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-hack-apk-with-fb-login_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/urban-network-robux-hack_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/roblox-free-green-shirt_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://key8013805.com.tw/upload/files/get-free-spins-coin-master-october-2021_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
font_00_sfnt_off00002a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A23 21572 bytes
SHA-256: b3363ff3968ba7f47eaecedae4c910e5d2450a0483de10947044a5e0634bbc43
font_01_sfnt_off0000590c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x590C 19360 bytes
SHA-256: 32758829a79875dd771fb86503ac4b447cd4865c717c3996ab2be57e0588f536

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