Malicious PDF — malware analysis report

Static analysis result for SHA-256 e103d643a1df518f…

MALICIOUS

PDF

45.1 KB Created: 2021-06-11 06:10:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 951dcac1f4c02f63c00f32885ed79364 SHA-1: 7b7761c30e1950f398e5374510453fcdd2d5c652 SHA-256: e103d643a1df518f7345a99c765db279bf78fd644a9d74c8da1ddcd5077e2685
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which appear to be part of a link farm designed to attract users searching for game cheats or free accounts. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs and a 'download button' heuristic further supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/how-to-hack-a-roblox-account-no-inspect-element-game-hack
    • http://poltekkesbanten.ac.id/e-lib/repository/free-alt-accounts-roblox_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-only_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-hack-mod-apk-download_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-download-2021_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/unlimited-spin-coin-master-hack_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-link-blogspot_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/exploit-hacks-for-roblox_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-hack-app-android-download_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-free-spins-coins_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/minecraft_GM479516143.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-hack-roblox-2021_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/is-there-a-free-version-of-minecraft_GM479516143.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-rare-cards-for-coin-master-christmas_GM406889139.pdf
    • http://poltekkesbanten.ac.id/e-lib/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052b2.bin
7c5a3ae48c52f93a12bc7109e2a8ad4897019dcaa6784451c05ed8082d2eff96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52B2 25244 bytes
font_01_sfnt_off00008b6a.bin
ebe4200a5e51b2ce25bc04e2c3d297be0ca5f5fdc2886909b30475ff5389c750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B6A 19024 bytes

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