Malicious PDF — malware analysis report

Static analysis result for SHA-256 731fb81a55005d45…

MALICIOUS

PDF

33.9 KB Created: 2021-06-25 21:58:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c07f4943766c0fe351e992d52859d8fc SHA-1: 6446b09b2b4cc755d494d9adfc51646d4b0581bd SHA-256: 731fb81a55005d45ddf864f6f32eda3fb1877cfbcc9e089c6a79644a6bbce569
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple lures for game hacks and cheats, directing users to external URLs. The primary URL, http://netcdn.co/app/431946152/roblox-hack-rar-game-hack, is flagged as a high-risk redirector for game hacks. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a malicious intent to trick users into downloading potentially harmful content, likely a second-stage payload.

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-rar-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/gg-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-java-edition-free-download-for-android_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/robux-offer-wall_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-bedrock-hacks_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/gold-card-coin-master-free_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-admin-commands-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/ash-greninja-free-shopping-in-roblox-on-roblox-shopping-shir_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/filtered-v12-roblox-cheat-download_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-hacks-on-minecraft_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_off00002f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F99 22140 bytes
SHA-256: 0a0772ef1e099da3ef021d41bbed1262fd11a5ac9782149a943010400edcf9fa
font_01_sfnt_off00006081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 18656 bytes
SHA-256: 089b68c6567bfd689f4fad21524cb2f9e4af4487108cd6e550a9b094288a401f

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