Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f267c4aa1b35b8f…

MALICIOUS

PDF

48.1 KB Created: 2021-06-13 19:40:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6cde9775eb56184804ca2ced87fbd1f4 SHA-1: 2ba9bf1c8becd4e36b90b18c2d72399740bc494c SHA-256: 8f267c4aa1b35b8f38c017f5ffdcf043a7c3e1517fc1b18959374f2051e3aed1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a primary URL pointing to download sites for game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for such content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9013

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.co/app/406889139/coin-master-hacks-for-android-game-hack
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-download_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-generator-no-verification_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/smart-lodhi-coin-master-hack_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-spins-coin-master-no-survey_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/robux-hack-me_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-no-verification-required_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spin-today-2021_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-link-app_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-free-spins-2021-ios_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-hack-apk_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/google-coin-master-free-spins_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/how-can-i-get-free-robux_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/roblox-font-free_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-hack-version-2021-download_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/free-roblox-accounts-dantdm_GM431946152.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/unlimited-coin-master-free-spins_GM406889139.pdf
    • https://www.hortonstmichaels.co.uk/admin/ckfinder/userfiles/files/minecraft-hacked-client-bedrock_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00005075.bin
9ac3142712a0a6c2c8ee5b65bd13f92b67c23a95a462bb09af6258a9bb1f3610		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5075 28096 bytes
font_01_sfnt_off00009079.bin
6e07e6753a1b7f3946429eb05e6ec352f38d71971554550c1c0ea562d62df99c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9079 2912 bytes
font_02_sfnt_off00009a88.bin
59174fbff90841f3d82b951a67024dd49c53f2706d138598019600dd1f76f1a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A88 18056 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.