Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5bb64b03aa83f2…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 05:13:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 878bed415429f41141e7fd78784f09cf SHA-1: e52adbadc570c7c70b4bc441b8fef1a52486b1b2 SHA-256: 2d5bb64b03aa83f25f598dfe0d55edabed1def0b06249cc7f26984df65c58573
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to download game-related software. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download' button lure further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.online/app/479516143/minecraft-education-edition-free-download-game-hack
    • https://morishita-tc.com.tw/image/data/files/roblox-land-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • https://morishita-tc.com.tw/image/data/files/today-coin-master-free-coins-link_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/free-spins-coin-master-hack_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/tiktok-free-usernames_GM835599320.pdf
    • https://morishita-tc.com.tw/image/data/files/how-do-you-earn-robux-on-roblox_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/roblox-hack-tool_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/wahoo-gaming-co-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/free-spins-coin-master-haktuts_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-spin-ios_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/hacks-for-coin-master_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/coin-master-hack-tool-2021_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/free-card-collection-in-coin-master_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/cm-free-spin-link-today_GM406889139.pdf
    • https://morishita-tc.com.tw/image/data/files/free-robux-codes-no-human-verification_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/robloxhacks_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/get-free-robux_GM431946152.pdf
    • https://morishita-tc.com.tw/image/data/files/free-spin-coin-master-twitter_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005357.bin
33949c45b3c13e729de66d0d1a7f707732c70be1915d2367a5640e4be5f4b0fe		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5357 25664 bytes
font_01_sfnt_off00008e4d.bin
ffd212011c299857b8c206bc096046ef339749d4fbf06de0c880e618f16f3952		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4D 3208 bytes
font_02_sfnt_off000098f9.bin
3a678da037c633a6a13339b3c5a4bd8322cea022da4d3ccfe017faaa6041de20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F9 18428 bytes

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