Malicious PDF — malware analysis report

Static analysis result for SHA-256 18a70b3a50de2560…

MALICIOUS

PDF

46.9 KB Created: 2021-06-09 14:09:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4fa92c72e5e360cfa93795414f6965b1 SHA-1: 42f33d463d7ba147d1ec955b748da95a8019e9e3 SHA-256: 18a70b3a50de2560abf6399e03296d6256172582b1c1bf51060308dfa3deea2d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and document text that strongly suggest a lure for downloading malicious content, likely related to game cheats or hacks. The ML classifier also flagged this PDF as malicious with high confidence. The presence of URLs pointing to game-related hacks indicates an attempt to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/roblox-hack-dll-game-hack
    • http://perpustakaan.yudharta.ac.id/etj/repository/robux-free-promo-codes_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-without-downloading-apps_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-free-robux_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-use-wurst_GM479516143.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/is-minecraft-free-on-xbox_GM479516143.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/how-to-hack-roblox-with-cmd_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/free-appsfor-coin-master-daily-rewards_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/claim-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-facebook_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/robux-no-verification_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/roblox-gift-card-for-free_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-attack-madness-hack_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/i-want-robux_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/earn-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/mobihack-net-roblox-hack_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/funny-roblox-characters-free_GM431946152.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/hacks-minecraft_GM479516143.pdf
    • http://perpustakaan.yudharta.ac.id/etj/repository/coin-master-hack-2021-apk-download_GM406889139.pdf
    • http://perpustakaan.yudharta.ac.id/etj/r
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f8d.bin
7ce16550e795ec9cd5f4dfbc4c30062ef54ab311f0c11fd291fae8a7981bf448		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F8D 24540 bytes
font_01_sfnt_off000087e4.bin
8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87E4 3464 bytes
font_02_sfnt_off0000941a.bin
dd6cce3d7b4a75194ce5f78707beec4ac88ae8bf937eae628fe0d06ef2b06373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x941A 18348 bytes

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