Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d0f6940f3ac2e2…

MALICIOUS

PDF

36.0 KB Created: 2021-07-06 09:38:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d145596b8a896fbab9ee16ca6ad75bb9 SHA-1: c7bf20be50a8ae95c810112e4c686f0b6bc6a9b7 SHA-256: 73d0f6940f3ac2e2169bec2a04600014b6ab49850c5426989cb3b99be7ddbd8b
102 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on a domain that appears to be part of a link farm. The document body and extracted URLs suggest a lure for users seeking game hacks and cheats, likely leading to malware downloads or phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.tw/app/431946152/a-lot-of-robux-game-hack
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/how-to-hack-through-wall-in-roblox_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/roblox-royal-high-school-hack_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/get-free-robux-from-watching-ads_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/best-coin-master-hack_GM406889139.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/roblox-lets-party-gear-testing-speed-and-jump-hack_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/minecraft-server-hacks_GM479516143.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/how-to-get-more-robux-for-free_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/roblox-how-to-execute-scripts-with-cheat-engine_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-spin-links-coin-master-2021_GM406889139.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/free-minecraft-client_GM479516143.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu//repository/roblox-phantom-forces-hack_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/roblox-snowman-package-free_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/coin-master-free-coins-2021_GM406889139.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/minecraft-cheat-client_GM479516143.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/how-to-get-free-robux-no-pastebin-no-inspect_GM431946152.pdf
    • http://perpustakaan.litbang.kemkes.go.id/tawangmangu/repository/put-me-on-it-application-free-roblox-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000341e.bin
0e3eadcc440f6b108b28d77d54ffffd19cbebc8359ca0f99b7dbda8d9bb07fd6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341E 23228 bytes
font_01_sfnt_off000068b4.bin
d04e08575e4efc43ec371b195521181e13837c014caa8c6a2ad7539eeb3e7d8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 18656 bytes

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