Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0d07b805498f02…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 15:41:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a1fb304474bcf3c1765a13bec0d8a8c9 SHA-1: afb2a67c7f0d16b6eea791a9343bc47d41d08b55 SHA-256: fe0d07b805498f02c16de62d4e8663ac54c53deab1b70a1158649392eb3326af
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, including one directly advertising a "free robux app 2021 game hack" at http://netcdn.tw/app/431946152/free-robux-app-2021-game-hack. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic or distribute malicious content. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.tw/app/431946152/free-robux-app-2021-game-hack PDF link annotation
    • https://7gking.tw/upload/files/best-roblox-exploits-free-v3rmillion_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-cheat-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/robux-hack-synapse_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-games-minecraft-free_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/every-free-roblox-item_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-builders-club-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-knvies-in-assassin-roblox-hack_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-hack-walls-in-strucid-roblox_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-arcane-adventures-hack_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-avatar-tester_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/roblox-for-free-no-signing-up-guest_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/how-to-get-free-robux-fake-card_GM431946152.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-daily-spin-link_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://7gking.tw/upload/files/free-robux-game-guardian-script_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_off00002ec6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC6 23128 bytes
SHA-256: 1203e33d5116b8cfcaa11fc1509e2d31cf8dc907ea35c651f25965846a049220
font_01_sfnt_off00006301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6301 19296 bytes
SHA-256: 2b5381b15c79e36d66fe09b00355aceabc7985a3bbfcc95a7c6d6095c4563c1b

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