Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb473651085edf69…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 12:26:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b337255dba6485f3f4eb9cef57a3e609 SHA-1: 69c9f487346bd768936d94969b5bf6dfa4eda824 SHA-256: eb473651085edf692203f64f331b56b4086334cd6ef108f9d03d2a3932cdc52e
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links disguised as guides for obtaining free in-game currency for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to redirect users to potentially harmful websites. The ML classifier also strongly flagged this PDF as malicious.

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/406889139/how-to-get-free-coins-for-coin-master-game-hack
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/hacks-in-roblox-jailbreak_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-get-free-robux-no-inspect-element_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/avatar-the-last-airbender-roblox_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/coin-master-online-hack-link_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-get-free-robux-games_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/robuxglobalcom_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/bux-gg-free-robux-without-human-verification_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-get-free-skins-in-minecraft_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-roblox-hack-youtube_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/is-java-minecraft-free_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/roblox-guess-the-song-cheat_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/roblox-games-free_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/be-my-baby-break-free-mashup-roblox-id_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-do-you-get-robux-for-free-on-pc_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/how-to-use-aimbot-hacks-in-roblox-hoops_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/hack-to-get-free-robux-easy_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/roblox-bux-free_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000032cc.bin
80af97c08bd932d7fd3eb8bd27810a6d520425f8030b9cc0b7fd51b5da8c2bb1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32CC 22988 bytes
font_01_sfnt_off00006647.bin
dbcb18f7bfdddec59cdd21c6f01db76fd89479467b7af7aa3f1646e0963d7b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6647 18164 bytes

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