Malicious PDF — malware analysis report

Static analysis result for SHA-256 359aea8b9694471b…

MALICIOUS

PDF

44.5 KB Created: 2021-06-03 09:09:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c909c9b1b21e2fe90150c0419d2a331f SHA-1: 1649cc9d2d4d6ff2cee0bd51cccbbbd65c2c83f9 SHA-256: 359aea8b9694471bf1ed734f39af2cb729aab4c501977d4e20c33577f3b7da62
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a high-severity heuristic firing indicating it links to a 'free generator / game hack' redirector. The embedded URL, https://netcdn.online/app/431946152/robux-free-c-game-hack, is the primary indicator of malicious intent. While no scripts were explicitly extracted, the PDF structure and the lure suggest an attempt to direct users to a potentially malicious website, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/robux-free-c-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-but_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-followers-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pokemon-go-free-qwilfish_GM1094591345.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pubg-uc-and_GM1330123889.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_off000052aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52AA 25056 bytes
SHA-256: 20a8673950ca9e94f8ced6c6c57b378eb531d300ea03a5efbb523d85a488ed6f
font_01_sfnt_off00008c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C45 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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