Malicious PDF — malware analysis report

Static analysis result for SHA-256 b16ef73684a64aaa…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 03:51:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94acf5a7e13b31b6a85c14919ebd3eec SHA-1: 5063d7af77466d83e46e7a5095641a8a454aeb4b SHA-256: b16ef73684a64aaa08f3e8c953550021cb89240e9c1ec189109a3c6c1142b278
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-optimized PDF gateways. The document body explicitly mentions 'how to get free clothes on Roblox' and includes a direct link to a potentially malicious URL, suggesting a lure for users seeking in-game advantages. The ML classifier also strongly indicated maliciousness.

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-to-get-free-clothes-on-roblox-games-game-hack
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-hack-through-walls-in-roblox-prison-life_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/free-radio-obby-roblox_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/free-robux-no-password-obby_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/robux_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-card-collection-hack-apk_GM406889139.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-free-pet-snacks_GM406889139.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-hack-roblox-accounts-on-ipad-2021_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-executor-free_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-hack-roblox-2021-september_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/blox-fish-free-robux_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/is-roblox-free-on-xbox_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-tradelands-hack_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/how-to-hack-coin-master-game-without-root_GM406889139.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-script-hack_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/coin-master-daily-free-spins-blog_GM406889139.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-hack-march-18_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdf
    • https://pustaka.stie-pembangunan.ac.id/repository/roblox-mustache-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000326c.bin
e4795edfba4a97b41405f209a117843362f0ab339199a35352fdadba495426ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x326C 22044 bytes
font_01_sfnt_off00006312.bin
8e065f29c440d25cc22505986db6fd282baf7cea20b79ba68ac3e641b48eeb80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6312 19344 bytes

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