Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b10c534f82619a5…

MALICIOUS

PDF

45.7 KB Created: 2021-06-03 13:51:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4ca048e6877d03988b9d44036aba2eae SHA-1: a6e72c3629998d41bdece9a5e81e8719f909a337 SHA-256: 3b10c534f82619a568954770992b5f793db6215efb7bfc37c612b42e1cd3af59
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a prominent one to 'roblox-island-royale-cheats-game-hack', which is flagged as a lure for game hacks. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest the document is designed to redirect users to malicious sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.online/app/431946152/roblox-island-royale-cheats-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/real-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coin-master-coins_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
stream_004_off00005406.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5406 25908 bytes
SHA-256: a4f8830b5550744b531aebc5c6c5e150277cefcc13c5702284de52f0a2da2589
font_01_sfnt_off00008ed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED4 18636 bytes
SHA-256: f9308897a1ad5c02d58f1366830a22d48483f1347fc3ef3770f8cfc4c4100040

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