Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2d246bbbdb6c29…

MALICIOUS

PDF

47.9 KB Created: 2021-05-16 16:04:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f7b89d1e8eea43e5b6792dd1e93cc1b7 SHA-1: 227a84b862a970ab66ea0fc58bb5ccc8b90e88f7 SHA-256: 9b2d246bbbdb6c29e15fc123a6f82e8282df7bdffda719b5ae203cae86b9df31
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are hosted on a domain associated with SEO link farming. The document body and extracted URLs suggest a lure for free game items (Coin Master, Roblox), indicating a phishing or scam attempt. The presence of embedded JavaScript, though not directly analyzed for malicious behavior, is a common vector for exploiting PDF vulnerabilities or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8715

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/free-spins-on-coin-master-cheat-game-hack
    • http://www.buapit.ac.th/UserFiles/File/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-cheats-2021_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-skins-in-roblox_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/free-robux-picture_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-hack-without-verification_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-and-coins-daily-links_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/roblox-free-items_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-robux-easy_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-link-spin_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-robux-on-pc_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/free-robux-codes-no-human-verification_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/wwwcoin-master-hack-game-download_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-stuff_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-moonactive_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/roblox-hacks-and-cheats_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/free-robux-card-codes_GM431946152.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-coins-no-human-verification_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spins-facebook_GM406889139.pdf
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-hacks-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004830.bin
b239a10df1aa1df04d5efb81f47c86dff5e417dbd405cc4d04e6875995667c24		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4830 24940 bytes
font_01_sfnt_off000081c6.bin
a17c2a746d49ac23b23e38a371e32fddecfcd91b10cf42ff6155bff6b8a07e91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81C6 4028 bytes
font_02_sfnt_off00008f67.bin
6fd7c7f447d66842f81aa8cf197935b17f22157d0c7e9f95622df1b5b4ddf530		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F67 2788 bytes
font_03_sfnt_off00009957.bin
fe6201d3401ff629ec36fd51f281c53e5c341abf286be0e75cffb2bca1c4c813		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9957 18052 bytes

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