Malicious PDF — malware analysis report

Static analysis result for SHA-256 8888981a40ad02be…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 19:58:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 238aa24ec7f3e8d9c35f5a423c68458f SHA-1: 952929ffa867fc49a25209a18459b5e7ffe4df14 SHA-256: 8888981a40ad02be6800d665e9322c2f53bb45d6a3ecbc763293c3ddb4600b4d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links and a document body that promotes free game items and currency, indicative of a phishing or scam lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, and the ML classifier strongly flagged it as malicious. The primary URL http://netcdn.co/app/431946152/free-roblox-card-codes-2021-not-used-game-hack is likely the final destination for the malicious payload or phishing attempt.

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/free-roblox-card-codes-2021-not-used-game-hack PDF link annotation
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-animation-in-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/ninja-animation-pack-roblox-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/robux-no-hacks_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/https-roblox-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/how-to-get-free-robux-easy-and-simple_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-fall-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/bux-gg-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/tiktok-free-coins-apk_GM835599320.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-robux-for-watching-videos_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/roblox-promo-codes-october-2021-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.itda.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA7 22676 bytes
SHA-256: 2a5932ca6f4d1546bc3fc3d826a2d23a7ce46881d4f73c1c6000e7e6bcdf6fd6
font_01_sfnt_off0000618b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618B 19328 bytes
SHA-256: ce0c60e82029dc805667e2a45e828a88b20102637abb56868948964bf658c6f5

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