Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a62d368581f2234…

MALICIOUS

PDF

33.6 KB Created: 2021-07-09 10:21:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 2eb3b6831993a5626f9717c38c6c24ec SHA-1: d92fad1f46e09c6052e8828bad0ada3b0d158b0d SHA-256: 1a62d368581f2234da3c56ff25ed000fd7941f64a724482c524d035a257e9b4a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency or hacks, directing users to the URL http://netcdn.tw/app/431946152/can-you-get-robux-for-free-game-hack. This URL is associated with a high-severity heuristic for game hack redirects, indicating a phishing or scam attempt. The document's structure and embedded links suggest it is part of a social engineering campaign to trick users into visiting potentially malicious sites.

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.tw/app/431946152/can-you-get-robux-for-free-game-hack PDF link annotation
    • https://cosmosocean.com.tw/upload/files/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/hacks-for-roblox-kat_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-free-spins--spins_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-accs-free_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-robux-codes-2021-july_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-free-robux-easy-no-hack_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-free-admin-in-every-roblox-game_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/coin-master-village-4_GM406889139.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/everything-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/roblox-hackfr-sans-verification_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-get-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/how-to-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/robux-tv-free-robux_GM431946152.pdfIn PDF document text
    • https://cosmosocean.com.tw/upload/files/pokemon-go-free-coins-hack-2021_GM1094591345.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_off00002d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D5F 22108 bytes
SHA-256: d91f26574653c58d2bf9941ddded8a27d5c2a140789c42e2fd7713ca49cfad59
font_01_sfnt_off00005e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 18984 bytes
SHA-256: 2c6f447800a96913986af3bd62aa8a594d802346a7a39b4742ef2d084cdb3097

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