Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9337ad168de7a17…

MALICIOUS

PDF

35.7 KB Created: 2021-06-27 04:04:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9975d98ee157c4963de79a7c6a5eadb7 SHA-1: 6af31fdddca11691756fccbb655db7a28649ed55 SHA-256: d9337ad168de7a17df6c51fd84320e2a6021570457e7f450b654599e3678b8d7
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to attract users searching for free game items or currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, and the 'SE_DOWNLOAD_BUTTON' heuristic suggests a call-to-action to download content. The primary URL http://netcdn.co/app/431946152/when-alone-roblox-has-been-released-for-free-game-hack likely leads to a malicious payload.

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.co/app/431946152/when-alone-roblox-has-been-released-for-free-game-hack
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-give-robux-on-mobile_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coin-master-free-spins-no-verification_GM406889139.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-december_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coinmaster-hack_GM406889139.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/play-coin-master-for-free_GM406889139.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-tiktok-hearts_GM835599320.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-you-get-robux_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-robux-no-verification-2021-android_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/daniel-newhard-roblox-hack_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/coin-master-hack-online-link_GM406889139.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/lazy-blocks-com-free-robux_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/flame-roblox-hacks_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/minecraft-java-free-download_GM479516143.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/smart-lodhi-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/how-to-use-wurst_GM479516143.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/real-free-robux-generator_GM431946152.pdf
    • https://elearning.mtsnbatang.sch.id/__statics/gudangsoal/files/free-coin-master-spins-blog_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000032f9.bin
84040c72e58794841924af35501ae26f2059620974ecc5760bab6ab3b230229c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x32F9 22800 bytes
font_01_sfnt_off0000662a.bin
57c2d6b81153a9feb27352254a2e11a5addae6fb54aa97371106d3bb9819f4ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662A 19188 bytes

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