Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa0e1eef238e944…

MALICIOUS

PDF

35.4 KB Created: 2021-06-23 15:31:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6e6edd22c389ad4c6d55c58db705cd76 SHA-1: 290ed23ca3eaa9fafb86e3af1a1b1f19db52f311 SHA-256: dfa0e1eef238e9443bb234475e89f9b2db5191e507b5042858fbf33669671b73
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a URL that promises free items for games like Roblox. The document body and embedded URLs reinforce this theme, suggesting a social engineering tactic to trick users into visiting a potentially malicious site. While no scripts were extracted, the PDF structure and the nature of the lure indicate an attempt to exploit user interest in free in-game items, likely leading to malware download or credential harvesting.

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/can-i-wear-clothes-i-make-free-on-roblox-game-hack PDF link annotation
    • https://limebug.com/media/storage/editor/files/what-is-a-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-tycoon-cheat-codes_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/mega-cheat-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-daily_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/coin-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-roblox-exploi_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robuxkingz-ml-free-robux_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/earn-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/roblox-microsoft-rewards_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/how-to-get-free-money-on-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/robux-free-ultimategamer365_GM431946152.pdfIn PDF document text
    • https://limebug.com/media/storage/editor/files/www-claim-gg-to-earn-free-robux_GM431946152.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_off0000310e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x310E 22776 bytes
SHA-256: 0f17ceffe63aa24652e40ca4c90c0141f3ed82445ea04969c6d417c21edaff96
font_01_sfnt_off00006416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6416 19484 bytes
SHA-256: 0d1a289c75fe8cfdff1a4a43ccd248c3b88bbfb2ea33092eef24f7e6baaa8afd

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