Malicious PDF — malware analysis report

Static analysis result for SHA-256 c916d4aaf6a4a72f…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 18:44:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d38075908beecad1944989b0bc7b9e64 SHA-1: 042101401f50566e8f0b6147fe3de550502bece3 SHA-256: c916d4aaf6a4a72f9351595b1a1073637ea2bddd4585e42da41e24845c375bfc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and free in-game currency. The document body explicitly mentions 'How To Get Free Robux' and includes a URL pointing to a potential download. This suggests the document is designed to trick users into visiting malicious sites that likely host malware or phishing content. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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.co/app/431946152/how-to-get-free-robux-melissa-game-hack
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-date-and-time-hack_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/give-me-robux-now_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/robux-hack-generator_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/how-to-get-free-robux-advertisment_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/get-free-robux-no-human-verification_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-robux-hack-no-verification_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-roblox-clothes-and-hair_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-robux-games_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/tiktok-like-bot-free_GM835599320.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/codes-to-get-free-robux_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/minecraft-free-minecoins_GM479516143.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/minecraft-dungeons-free_GM479516143.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/free-spin-coin-master-game_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/get-free-robux-no-human-verification-or-download_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/hack-card-collection-coin-master_GM406889139.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/roblox-hack-apk_GM431946152.pdf
    • https://www.shoppingmart.ie/uploaded_files/userfiles/files/coin-master-hack-tool-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003353.bin
922cf02badd589eaa4628614b5e79bdfa00d8780250c3ae5f8885a347d019783		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3353 21800 bytes
font_01_sfnt_off00006392.bin
7262817eda20f1cec9b473ad1f9141760989412015a6d7820b1ac4617352a2bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6392 19372 bytes

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