Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f2c2cc9b5fca7c…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 16:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d033a08f6ed6d68268a9a7dc6b2af34b SHA-1: ab566648e6148987daae8d3f395178593ac50d13 SHA-256: b5f2c2cc9b5fca7cee86253a000cd6eb5166bab7843433e3b9fef5326d3e136b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lure users with promises of game hacks and free currency, specifically mentioning Roblox and Coin Master. The primary URL, http://netcdn.co/app/431946152/roblox-hack-account-2021-game-hack, is identified as a redirector for malicious content. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely leading to a download or further redirection.

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.co/app/431946152/roblox-hack-account-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-invite-friends-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-ro-hack-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-free-suit_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/stella-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-no-apps_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.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
stream_002_off00002d89.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D89 22784 bytes
SHA-256: 3613906cc9a1529abf543c40e3ac297c822abdadaca675aa6ab15b7968552f3a
font_01_sfnt_off000060c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C8 19300 bytes
SHA-256: 9215a71f0313ec3b86bb2223599d07492d412e8d319b83cd9fb2ef2774b89bb2

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