Malicious PDF — malware analysis report

Static analysis result for SHA-256 82350d0c9051544f…

MALICIOUS

PDF

44.4 KB Created: 2021-05-14 10:30:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 13edaa550b4a18c42970760664982212 SHA-1: 516a554fd5d70e1d3c53b8978a46aa81cc0e7cc5 SHA-256: 82350d0c9051544f56fb67b80d4299d2497aa0ab459564c677cb445079059857
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to malicious websites. The document body and extracted URLs indicate a lure related to "Coin Master" game hacks, likely serving as a phishing or malware distribution front. The presence of external links and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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 https://netcdn.xyz/app/406889139/coin-master-free-soins-game-hack
    • http://ukrainiansofbuffalo.com/images/hack-para-coin-master-singapore_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/free-spin-coin-master-2021_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://ukrainiansofbuffalo.com/images/roblox-rules_GM431946152.pdf
    • http://ukrainiansofbuffalo.com/images/free-robux-website_GM431946152.pdf
    • http://ukrainiansofbuffalo.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/coin-master-free-spins-2021_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/coin-master-free-spins-link-download-free_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/hack-coin-master-mod-apk_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/need-free-spins-for-coin-master_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/earn-robux-today_GM431946152.pdf
    • http://ukrainiansofbuffalo.com/images/how-to-get-free-chest-in-coin-master_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://ukrainiansofbuffalo.com/images/coin-master-fun-hack-online_GM406889139.pdf
    • http://ukrainiansofbuffalo.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • http://ukrainiansofbuffalo.com/images/minecraft-linux-free_GM479516143.pdf
    • http://ukrainiansofbuffalo.com/images/free-robux-without-verification-or-survey_GM431946152.pdf
    • http://ukrainiansofbuffalo.com/images/coin-master-free-spin-link-twitter_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004aaf.bin
78a6e4db7a6287da32e1fa70c0ac43ccae986d0892dfbaa922a555a96e7c8778		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAF 24636 bytes
font_01_sfnt_off0000832c.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x832C 2840 bytes
font_02_sfnt_off00008cde.bin
a621fa0cf6ecf429ccb0e9762dad0d1971a2824e8730eca88621f5efe7e14995		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDE 17712 bytes

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