Malicious PDF — malware analysis report

Static analysis result for SHA-256 5999d644497703ac…

MALICIOUS

PDF

35.5 KB Created: 2021-07-04 08:29:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 73f6ffca3a6b2ff52af8cbd5fc2df907 SHA-1: 1cba238ee62f2ab41c0c409dff06ffd9784e1f49 SHA-256: 5999d644497703ac85c6c16ab9253d5406dfb3eebaf7ad52b349c239ab70e472
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by an ML classifier and contains a large number of external links, many of which point to other PDFs hosted on similar domains. The document body and extracted URLs suggest a lure for users seeking game cheats or in-game currency, such as 'free Robux', which is a common social engineering tactic. The presence of a 'download button' heuristic further supports the intent to trick users into clicking malicious links.

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-real-game-hack
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-hack-tool-robux-and-tix-download_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-change-values-on-roblox-with-cheat-engine_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/links-for-coin-master-free-spins_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-live_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-saob-hack_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/azurewrath-hack-roblox_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/robux-earning-websites_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-outroageus-roblox-codes_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-reward-link-2021_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-hack-roblox-jailbreak-with_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-imagine_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/coin-master-hack-online-android_GM406889139.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/rblx-city-free-robux_GM431946152.pdf
    • http://www.reach360stock.com/uploaded_files/userfiles/files/roblox-script-executor-free-not-cracked_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032f3.bin
45ff2c43765acd87acea4fad4667faefef234a07f4646ea77e371e934d03376d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32F3 22988 bytes
font_01_sfnt_off00006672.bin
4bc1fb5241f7d1727492069c2276e888dd2add0fc79522b75a602c51baadbe08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6672 18788 bytes

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