Malicious PDF — malware analysis report

Static analysis result for SHA-256 4001fbbfa600a1cc…

MALICIOUS

PDF

43.7 KB Created: 2021-06-04 04:04:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 43060d6908b87a6de109800662261cef SHA-1: c4689a4ea000514a300caac160e92238f1ef3c0e SHA-256: 4001fbbfa600a1cc99f9a3316a1d72cc7077f6c9a5e636231fba51ca13f847fd
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA heuristic, indicating a social engineering attempt to trick the user into performing an action. The document body and extracted URLs point towards downloading a "hack tool" from the provided URL, which is highly suspicious. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/coin-master-pc-hack-tool-game-hack
    • https://library.sman1berau.sch.id/repository/pubg-uc-whatsapp-group_GM1330123889.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-unlimited-spin-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-minecraft-coins_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/www-roblox-com-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-pc-hack-tool_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-generator-no-human-verification_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-coin-coin-master_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-unlimited-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/robux-no-verification_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/minecraft-java-edition-free-code_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/free-roblox-clothes-codes_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-minecraft-hosting_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050d2.bin
ebe1d7ad55c2e42541262b9c6c66d17cc948864c8a25f1f27236641b66cab122		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D2 24624 bytes
font_01_sfnt_off0000893c.bin
c961cc6170e33614cb17d128388173b4a7f7b730d965861fef337064689bdc5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x893C 17944 bytes

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