Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad944fda90b49de2…

MALICIOUS

PDF

36.1 KB Created: 2021-06-25 07:04:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f54dde4216bf2bf3aae839ad40dc64fa SHA-1: 226f6c737bf8ca1de77ae2ef50e6c43429ebec99 SHA-256: ad944fda90b49de2a3f913f98657d2aedf5990902895e1b481c532f0e5aa3ac7
142 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured to appear as downloadable files related to game cheats and hacks. The presence of 'cmd_GM431946152.pdf' in a URL and the 'LOLBIN_RUN_COMMAND' heuristic suggest an attempt to execute commands or download further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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/ninja-animation-package-free-roblox-game-hack
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/comment-hacker-roblox-avec-cmd_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-pin-numbers-for-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-give-yourself-free-robux_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/robux-hack-ohne-handy_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/minecraft-windows-10-hacked-client_GM479516143.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/roblox-vehicle-simulator-hack-download_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/minecraft-login-free_GM479516143.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-games-online-like-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-speed-hack-in-roblox-mobile_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/hacka-for-mobile-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/roblox-code-on-how-to-get-clothes-for-free_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-cars-in-roblox-high-school_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-game-pass-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/innovation-hack-roblox_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/cheat-in-roblox-jailbreak-money_GM431946152.pdf
    • http://elearning.mimcabangpurbalingga.co
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003320.bin
a5be1e37cedd8626849f397fad879cfa1d3399e11cb989499c9521871ec3f5b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3320 22820 bytes
font_01_sfnt_off00006675.bin
d7d2fbdf322a8c1b33f1b4ccbd7396401c0b0659767a59a05c52ebb782600efc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6675 19648 bytes

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