Malicious PDF — malware analysis report

Static analysis result for SHA-256 54bfc5aee329032c…

MALICIOUS

PDF

36.0 KB Created: 2021-07-04 22:28:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c66f063b23b2db5b8a99f9015520127c SHA-1: 6a5295ba528d867bb8606d3a61bae2526ed04a10 SHA-256: 54bfc5aee329032cba0805bc76bd6dbb25a790c0c59ec3c34c3a26a938be650a
102 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 hosted on domains associated with SEO link farms. These links promote "hacks" and "cheats" for popular games, suggesting a lure for users to download potentially unwanted or malicious applications. The ML classifier also strongly indicated maliciousness.

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/coin-master-hack-apk-download-for-android-mobile-game-hack
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-today_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-pokemon-brick-bronze-cheats_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-free-black-adidas-t-shirt_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-codes-2021-june_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-spin-free_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-free-spins-and-coins-hack_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/code-for-free-robux-2021_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-lumber-tycoon-2-hack-tool_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-on-iphone_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/cheat-codes-vhicule-simulator-roblox_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-coin-master-androd-cheats-2021_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/roblox-free-robux-com_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/coin-master-exchange-40-free-spins_GM406889139.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/como-descargar-hacks-btools-para-jailbreak-roblox_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/red-boy-robux-hack_GM431946152.pdf
    • http://johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003440.bin
dbadde4f07e9beed780723a1f7fd9511abcfb229eb41d5d92004ff1af2df25e8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3440 22932 bytes
font_01_sfnt_off000067b8.bin
c53d2e4551704513ea21f968575630d68637a1ba3fa70d55f6a82605479b2a84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B8 19084 bytes

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