Malicious PDF — malware analysis report

Static analysis result for SHA-256 27894a71ff6b962a…

MALICIOUS

PDF

34.5 KB Created: 2021-06-28 08:42:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b62ea8d4e36ecd0077fd8e113eee820f SHA-1: 9a81d3add26e38f999ff78d4d77e828b44859f53 SHA-256: 27894a71ff6b962a608bde9052d6455fd97c1b31c95afe3edee2f294ff8c4f01
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of embedded URLs, many of which are related to 'Roblox Robux Hack' and other game exploits, suggesting a lure for users to visit malicious sites. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, and the ML_NYX_PDF_MALICIOUS score is very high. No scripts were extracted, but the document body and heuristics strongly suggest a phishing or scam 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.co/app/431946152/roblox-robux-hack-inspect-element-game-hack
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/how-to-become-a-hacker-in-roblox-easy_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/roblox-free-body_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-a-free-boombox-on-roblox_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/roblox-vehicle-simulator-free-money-codes_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/assassin-roblox-hack-script_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/free-robux-no-survey-no-download-2021-no-human-verification_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/roblox-how-to-get-synapse-for-free_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/roblox-pet-simulator-how-to-get-hacked-pets_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/food-empire-roblox-hack_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdf
    • http://pustaka.fkm.unand.ac.id/repository/trigon-roblox-cheat_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/roblox-escape-mcdonalds-free_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/roblox-hack-how-to-see-peoples-inventory_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/is-tiktok-free_GM835599320.pdf
    • http://pustaka.fkm.unand.ac.id/repository/free-games-with-gamespasses-roblox_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/how-to-hack-peoples-robux-in-roblox_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/robux-cheat-engine-64-download_GM431946152.pdf
    • http://pustaka.fkm.unand.ac.id/repository/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f0c.bin
9fe8ee6a43d85f64404f86c7547fec70299d283c8f68b4daa60131899820e107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0C 22240 bytes
font_01_sfnt_off000060ad.bin
835966d836c1c950c222c5fbd484235f68178792766f6dc48c8d3396c6feb269		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60AD 19336 bytes

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