Malicious PDF — malware analysis report

Static analysis result for SHA-256 56583c76a2c9c142…

MALICIOUS

PDF

34.9 KB Created: 2021-07-08 12:58:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cd53b85eff9a25f57f306c9bda541f67 SHA-1: 7907daf9b5f49e49836e0f0da5f567643be62f15 SHA-256: 56583c76a2c9c142fa2da785e05d36a3236f6cea9828df9a8a789d76fe332ace
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 cheats. The primary URL http://netcdn.tw/app/479516143/how-to-use-redstone-game-hack suggests a lure for game-related exploits. The presence of a 'download button' heuristic further supports the malicious intent of directing users to download potentially harmful content. No scripts were extracted, but the overall structure and linked content indicate a phishing or malware distribution attempt.

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/479516143/how-to-use-redstone-game-hack
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-roblox-accountts_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/archery-master-3d-coins-hack_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-map_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/hacks-para-roblox-sin-inyectores_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-spin-link-today_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-robux-in-2021_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-hack-explorer_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/help-im-being-cheated-on-by-some-roblox-girls_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-free-hat-obby_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-hack-tool-pc-download_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-hair-roblox_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/dll-hack-for-roblox-assasin_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/free-robux-no-verification-no-survey_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/60-free-spins-coin-master_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/best-minecraft-hacked-client_GM479516143.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031bf.bin
9170f6f76f7f347012ffcc612491dba4b8b8d3d16111c989e90431ac5eec77ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31BF 22960 bytes
font_01_sfnt_off00006531.bin
8a198e1e9864b91c1b5565f58586ff873331d1eac158ce45a3b769fb78f5fc68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6531 18400 bytes

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