Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e8e0c52abc77026…

MALICIOUS

PDF

46.4 KB Created: 2021-06-04 00:11:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4e26233f14200e18f6ca9eafbeacea86 SHA-1: 8a1d29f2d58af85dfd99383a33d7964c500581bc SHA-256: 5e8e0c52abc770268cb72b87c2a2b5bd0429fa7bdde9cc5c98c8e8cccd07263d
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 call-to-action phrase, strongly suggesting a lure to download malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, likely for SEO manipulation, pointing towards a phishing or malware distribution scheme. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/479516143/minecraft-free-ios-2021-game-hack
    • http://perpus.poltekeskupang.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-app-download-free_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-app_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-daily-spins-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-hack-without-verify_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-robux-easy_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-free-roblox_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/what-is-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-70-spin-link-today_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/roblox-hack-com_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-glasses_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/daily-coin-master-free-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/minecraft-windows-10-key-free_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdf
    • https://freegiftcodes.eu
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005134.bin
9790eb1acb92185fafbef32a51522d68c92c79a797ea689f9bb47e2dca66efa8		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5134 24680 bytes
font_01_sfnt_off00008935.bin
20e88e247102f07c6a70b4d36c7da419714b68793fc4cb00c42292950da9c9bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8935 2840 bytes
font_02_sfnt_off000092f1.bin
b55c1404a277e69c847ae3cf6ace6563469f03eb0031cfae1db94f462975a683		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F1 18112 bytes

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