Malicious PDF — malware analysis report

Static analysis result for SHA-256 58ef45e80cfbd9eb…

MALICIOUS

PDF

43.0 KB Created: 2021-06-04 03:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5e4b9b8b77b2e73266bf1fa854e09468 SHA-1: ddc94d135eb55619a9d035ed22f27da7311b89dc SHA-256: 58ef45e80cfbd9eb65cc2c1e01835fe3c7a988a66cdc98c5db8b71c67e1c13cc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which appear to be part of an SEO link farm. The primary URL, https://netcdn.online/app/406889139/free-coin-master-spins-game-hack, suggests a lure for game-related cheats or hacks. The presence of a 'visual download button' heuristic further supports the idea that the document is designed to trick users into clicking these links, potentially leading to malicious downloads or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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/406889139/free-coin-master-spins-game-hack
    • http://perpus.i2s-learning.com/repository/master-coin-free-link_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/how-to-get-coin-master-free-spin-link_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/nuevo-hack-de-robux-2021-realmente-funciona_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/daily-coin-master-free-spins_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/free-robux-on-ipad_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/pokemon-go-fest-free-tickets_GM1094591345.pdf
    • http://perpus.i2s-learning.com//repository/roblox-promo-codes-for-free-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-free-cards-hack_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/free-robux-with-no-survey_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-2021-generator_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/jailbreak-roblox-hack_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/tiktok-free-followers-hack_GM835599320.pdf
    • http://perpus.i2s-learning.com/repository/60-free-spins-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-coins-on-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-minecraft-bedrock-server_GM479516143.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-play-online-free_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/2021-no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e53.bin
0b937990834e5b6aa335ba715c1bbc9590737ff7fc3a77ee2f173255f1b00371		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E53 24436 bytes
font_01_sfnt_off0000868b.bin
dbba0adc3b1b7bb8b2e5e51fec5d28ab169e2f7a165ed2a14d616932af559aea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x868B 17884 bytes

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