Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde38db046561382…

MALICIOUS

PDF

43.8 KB Created: 2021-05-11 18:04:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c895d939bf782462d9949893f961ae6f SHA-1: 71a7e9ccd0467c8ba93962b2ca52426a8aefaae3 SHA-256: cde38db04656138220f301bd19ae153ede77922b807666d963a072b31eccbf2f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to other PDF files hosted on the same domain, suggesting a link farm for SEO manipulation. One of the embedded URLs, 'https://netcdn.xyz/app/479516143/plug-toolbox-for-minecraft-free-ios-game-hack', is presented as a download for a game tool. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent. The document's structure and content are consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/479516143/plug-toolbox-for-minecraft-free-ios-game-hack
    • https://www.modestuae.com/uploaded_files/userfiles/files/roblox-hax_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-games-like-coin-master_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/rewards-roblox_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-earn-free-robux_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/toolbox-for-minecraft-windows-10_GM479516143.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-card-collection-link_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-free-cards_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-game-packs-for-coin-master_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-online-hack-link_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-card-collection-hack-2021_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-java-edition-key-free_GM479516143.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/easy-way-to-get-robux_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-spin-coin-master-apk_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/is-java-minecraft-free_GM479516143.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/minecraft-jar-free_GM479516143.pdf
    • https://sigmaclient.info#2
    • https://flux.today#3
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e93.bin
ccd66e7f3ce6f20f75b3586b868e85930b25296fba1a4627008740fa3fccbf32		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E93 25204 bytes
font_01_sfnt_off000087be.bin
9cf7fe8b5647e01d4eb492bc675b0c64d11ed2e32af9da0d2909089a9be9f8b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87BE 18736 bytes

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