Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7cf38735d46787…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 14:37:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1226c4fe24a03ac126f70ac4e1b03b86 SHA-1: f5808d06450393980286772d617c226bd40687bc SHA-256: ac7cf38735d46787f1c3c7027f8b7f896a651539d19903e4bbf1c6f4564fd205
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 related to game hacks and free in-game currency. The document body and extracted URLs suggest a lure for users to click through to potentially malicious websites. The PDF_SEO_LINK_FARM heuristic indicates a mass of external links, and the ML_NYX_PDF_MALICIOUS score is very high, confirming malicious intent.

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/406889139/get-free-spins-in-coin-master-game-hack
    • https://library.sman1berau.sch.id/repository/watch-ads-for-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/static-moonactive-net-free-spins_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/minecraft-free-online_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/is-java-minecraft-free_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/www-coin-master_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/roblox-free-robux-no-human-verification_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-roblox-adopt-me-accounts_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-coins-ios_GM1094591345.pdf
    • https://library.sman1berau.sch.id/repository/www-bandicam-com-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-coin-master-spin-generator_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/roblox-com-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • https://coinmasterspinandcoin.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005338.bin
1bb27ee12ac8e95358f864f36c63b0d92e66a8cd0dad2d61976adf839427abf7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5338 24524 bytes
font_01_sfnt_off00008a97.bin
156f4ef702737132daa243a2c4fee8c0c13bec142009a1eebf0215f7cb8aef95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A97 17884 bytes

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