Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c511ead503c6969…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 05:56:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ea29686ca4e46967f6025199f2ef0201 SHA-1: 39486e8c1a9ac0cf604129de83bd468ca422ebe1 SHA-256: 5c511ead503c6969feaceec589b2a9c650dd8c0c1dc448562f3dcfdffafbfb2c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to attract users searching for game cheats or hacks. One of the embedded URLs, 'https://netcdn.online/app/431946152/rbxdemon-game-hack', likely serves as the primary malicious payload download. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/431946152/rbxdemon-game-hack
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/pokemon-go-free-codes_GM1094591345.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/pokemon-go-free-100-iv-coordinates_GM1094591345.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-free-spins-twitter_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-robux-glitch-2021_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/free-roblox-promo-codes-for-robux_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/optifine-pe_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-hack-pro-gamers_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/grabpoints-robux_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-free-spins-link-march-2021_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-hack-pc-download_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/claim-free-spins-coin-master_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-hack-2021-without-verification_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-tiradas-gratis-2021_GM406889139.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id/repository/blox-fun-info_GM431946152.pdf
    • http://perpustakaan.poltekkespangkalpinang.ac.id//repository/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f5c.bin
f2cb3491b5e3b197f7cae3f7860ed5356974e3f13bbd48ef45604d9bc871e883		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F5C 25132 bytes
font_01_sfnt_off00008945.bin
84e994ea3e0766e4b6b44f1efc08852f1b1b6721f581ba32b946cb803bfb180d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8945 18144 bytes

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