Malicious PDF — malware analysis report

Static analysis result for SHA-256 e238c82ba525c2a8…

MALICIOUS

PDF

48.7 KB Created: 2021-06-11 04:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d01853ee682b01290acc27766f18de04 SHA-1: 3f1d56b885d94fb971799ccec2659a1c5020a47a SHA-256: e238c82ba525c2a8322b5b13f336e9f27b02e3072f6aa53adee26e8cdf5d848b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are SEO-optimized and point to sites offering game-related cheats or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The presence of a download button lure further supports the malicious intent of directing users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.tw/app/431946152/basic-roblox-hacks-game-hack
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-free-robux-on-android_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/wurst-client_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/hackear-coin-master-sin-root_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-gift-card-free-no-human-very-or-survey_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-jailbreak-checked-cash-money-hack_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-spin-hack-no-verification_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-robux-for-free-on-computer-2021_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/www-roblox-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-games-online-free-play_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-minecraft-server-hosting-24-7_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-hack-ios-app_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/minecraft-free-minecraft_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/roblox-hack-app_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-coins-coin-master-ios_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-32-hack-apk_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-music-id-break-free_GM431946152.pdf
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-blonde-hair-roblox_GM431946152.pdf
    • http://wolfzscripts
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ffa.bin
dfdc71dd8fe4cf4ca6827a8747fdef6a7df7918645a4b60ead7630c4abd35c6c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFA 30276 bytes
font_01_sfnt_off00009210.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9210 2832 bytes
font_02_sfnt_off00009bc1.bin
c2922a7a4deabb3def81107113291bf30499cc814a60a739c898d9dc9383e4c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC1 18300 bytes

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