Malicious PDF — malware analysis report

Static analysis result for SHA-256 25579bc8fc68fb86…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 18:18:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 49f81eeb4035501848b4562c9221df0d SHA-1: b224b3b078d75c2192c6144c634520b671c0b64d SHA-256: 25579bc8fc68fb86ec9e71da419a9f75ac7f7556fd6d35a598c54f9f3105108d
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 hosted on domains related to game hacks and free virtual currency. The document body explicitly mentions 'Free Robux' and includes URLs that suggest a lure for users seeking cheats or exploits. The presence of a PDF link farm heuristic indicates a large number of outbound links, likely to facilitate the distribution of malicious content or to manipulate search engine results. No scripts were extracted, but the overall structure and content strongly suggest 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/431946152/free-robux-come-game-hack
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-bad-behaviour-solve_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/roblox-adopt-me-hack_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/redeem-roblox-gift-card-free_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdf
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/roblox-metal-detector-simulator-infinite-money-hack_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-minecraft_GM479516143.pdf
    • http://digilib-ppsunisma.ac.id/repository/roblox-cheat-dll-2021_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/does-roblox-hack-your-computer_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/can-you-get-banned-for-hacking-in-roblox_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdf
    • http://digilib-ppsunisma.ac.id/repository/mascara-de-hacker-en-roblox_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/redeem-cards-for-roblox-free_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/today-coin-master-free-coins-link_GM406889139.pdf
    • http://digilib-ppsunisma.ac.id/repository/all-roblox-catalog-free_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-generator-2021_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/real-robux-generator-2021_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/free-robux-codes-not-used-2021_GM431946152.pdf
    • http://digilib-ppsunisma.ac.id/repository/equixel-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e16.bin
cee5b23052afd05a518139c2ee09c405c52edc544633a0409093b106cee0af5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E16 22384 bytes
font_01_sfnt_off00005fb1.bin
20782bd0acfe52469dc9f14a315b4aee1c9563688044d1d6d3a516ef71528a8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB1 18976 bytes

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