Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de31106feb90280…

MALICIOUS

PDF

33.7 KB Created: 2021-06-18 00:23:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c8dd5b6f99bec8995b846c658bc66aea SHA-1: 7a745236ba66d632270538984e41b3bc7a5d44a8 SHA-256: 0de31106feb902805c40e9f652113351b31a9d7b21f338159c5fe7c7cf32913b
102 Risk Score

Malware Insights

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

The PDF document contains numerous links, including a primary URL pointing to a game cheat download, and a large farm of other PDF links hosted on lib.unitri.ac.id. These links are designed to entice users to download files, likely containing malware. The ML classifier strongly indicated maliciousness, supporting the interpretation of a malicious lure.

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-high-school-cheat-engine-game-hack
    • https://lib.unitri.ac.id/repository/fly-script-hack-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/minecraft-free-online-games_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/my-roblox-girlfriend-cheated-on-me_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/coin-master-hack-online-cheat_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/hack-roblox-btools-2021_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-skins-in-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/boombox-backpack-roblox-free_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/roblox-admin-house-hack-kohls-admin-house_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/coin-master-gold-cards-free-link_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/how-to-get-free-stuff-on-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-on-macbook-pro-2021-ios_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/rbxoffers-com-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-real-robux_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/coin-master-free-redeem-code_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1a.bin
d57bec1a8e2a05c1cc21766bce875fee0666a31b7cdd39941500e57fd3c1efad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1A 22112 bytes
font_01_sfnt_off00005fa8.bin
3f93a6fd90b4e77416808678de97db949cf0228b8cbf0449587288bb6ce8e0b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA8 18688 bytes

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