Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d62d79c2872af7…

MALICIOUS

PDF

34.8 KB Created: 2021-06-25 22:00:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7cd21a938378e865ad2e5364b9ddaa2f SHA-1: e873774b9b1fc9c3db2abaddc7efa65cee6badf2 SHA-256: 54d62d79c2872af7663f1b9791146a1719a91ee960073c681a52e3faca4d9eec
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs and a document body that promotes free Robux and game cheats, indicating a lure for users to click on malicious links. The PDF_SEO_LINK_FARM heuristic suggests a deliberate attempt to create a link farm, likely to distribute malware or conduct phishing. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this document.

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/how-can-you-get-robux-on-roblox-for-free-game-hack
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-computer-core-roblox_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-fun-com-free-robux_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-call-of-robloxia-5-cheats_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-robux-no-hacks-2021_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-free-shirts-and-pants-without-builders-club_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-free-robux-actually-works_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/hacks-para-roblox-jailbreak-2021_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/cheat-roblox-pet-simulator_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/get-free-robux-2021-no-survey_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-money-in-ud-roblox_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/candy-cheats-in-murder-mystery-2-roblox_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/hack-homestread-roblox_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/break-block-roblox-script-hack_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/codes-that-people-think-your-a-hacker-roblox_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/minecraft-online-free-download_GM479516143.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/how-to-get-20210-robux-no-hack_GM431946152.pdf
    • http://pustaka.biologi.fmipa.unand.ac.id/repository/roblox-piano-hacks_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003018.bin
518ba31ab138f8de36835cab214cca567d80ea1a06214120a1f1bfd037324b19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3018 22540 bytes
font_01_sfnt_off0000625e.bin
6caac23115ee16360932b294116c51eec136ad71b4d36a8e09134b86da49e667		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625E 19220 bytes

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