Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eeb5430f5cd8e33…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 09:12:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fe4e5f2f2ecf3d84a65c92ea7fa70fa1 SHA-1: e06c5926930d9a3c8f7ccd7e036655a1af590a9b SHA-256: 1eeb5430f5cd8e3386eca6fa73ed60edb3fc93808891bb9fc1d2b96d43a34de3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, directing users to sites that promise cheats and hacks for popular games. The ML classifier strongly indicated maliciousness, and the presence of external links suggests a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent to redirect users to potentially harmful content.

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/406889139/coin-master-free-coins-cheat-game-hack
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-change-the-skybox-in-roblox-hack-script_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-hack-my-roblox-account_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/play-roblox-free-online-login_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/give-free-robux_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-hack-roblox-servers-2021_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-fly-in-roblox-hack_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-generator-no-survey-or-download-2021_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/roblox-hack-tool-account_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-do-i-get-free-spins-in-coin-master_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master--hack_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/robux-offer-wall_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-robux-gift-cards-reddit_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/free-avatar-on-roblox_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/coin-master-links-free-spins_GM406889139.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/get-get-free-robux_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/how-to-win-free-robux_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/roblox-land-free-robux_GM431946152.pdf
    • https://www.modestuae.com/uploaded_files/userfiles/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030da.bin
d04bc922b21d012cc5c4ee3a4cecbec3060d33818d5c8a8ac29319e59e7c839d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30DA 22664 bytes
font_01_sfnt_off0000635b.bin
43b2cd904f38a7d3d2a55d0f85767f707de4b7de0854c719ea1a97ce2ab6716d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635B 18164 bytes

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