Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f9696097db9afa3…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 14:30:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 441c6828e63ea35bf573255609e3a909 SHA-1: 7904eca084ea35e2752a4328d90f0bf3287e69b0 SHA-256: 3f9696097db9afa378499d62e2f7e31d94a19a61fbfd5f105d5843dbe09a88f8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and references to game "hacks" and "free items" for popular games, indicating a phishing or scam attempt. The heuristic 'SE_LOLBIN_RUN_COMMAND' suggests the document may attempt to execute commands, likely to download and run a second-stage payload from one of the provided URLs. The ML classifier strongly flags this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-hack-money-2021-game-hack
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/get-free-robux-5uecom_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/hack-coin-master-with-lucky-patcher_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/hack-coin-master-for-android_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-free-bundles_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-card-hack_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-free-spins-only_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/minecraft-ps4-free_GM479516143.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/coin-master-free-coins-links-2021_GM406889139.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/pastebin-roblox-free-robux-2021_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-hack-bars-2021-for-pc_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/who-to-get-free-robux_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-into-anyones-roblox-2021_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-ban_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-army-free-robux_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/how-to-hack-accounts-on-roblox-with-cmd_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/roblox-cheat-codes_GM431946152.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/pokemon-go-free-levels_GM1094591345.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/userfiles/files/pokemon-go-free-30-ultra-balls_GM1094591345.pdf
    • http://stikomyogyakarta.ac.id/ckfinder/u
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003168.bin
c6693c1fdb789b2bbf88e90c5c96535a44027ec737e8296cc7e26d3e3632c808		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3168 22588 bytes
font_01_sfnt_off000063f4.bin
5f44c68c04d5a7a1d43e89d885b491131212e554edb60d36c3c7c07e4001704e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F4 19432 bytes

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