Malicious PDF — malware analysis report

Static analysis result for SHA-256 22d58a1f24644285…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 06:15:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bda59fd1f7cfbccf3d428430c4b33376 SHA-1: c1338a4df9c38d0a53eae2794896de7c29fced83 SHA-256: 22d58a1f24644285fed07931d65c7e3f7c281ef296ba1c90b0ebb9de0c0d0e19
82 Risk Score

Malware Insights

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

The PDF document displays a fake CAPTCHA, a common lure to trick users into interacting with malicious content. It also contains an embedded URI pointing to 'netcdn.tw', which likely serves as a download or redirection point for a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/how-to-make-a-minecraft-server-for-free-game-hack
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-daily-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-hack-spin_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-link_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/alfheim-online-free-accessories-roblox_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-2021_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/roblox-hack-client_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/coin-master-free-coin-and-spin-app_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition-codes_GM479516143.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/win-free-robux_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-roblox-wings_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-email_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/lucky-patcher-coin-master-hack_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/is-minecraft-education-edition-free_GM479516143.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/cheat-engube-55-roblox_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/spin-link-coin-master_GM406889139.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-minecraft-severs_GM479516143.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/mejor-hacker-de-roblox_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/roblox-my-account-was-hacked_GM431946152.pdf
    • https://elearning.mtsn2pml.sch.id/__statics/gudangsoal/files/free-robux-ad_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000326a.bin
dccc683c085029e46f3f6b15d6a136c769805368ab8f52139fc10af9072f66a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x326A 22356 bytes
font_01_sfnt_off000063d1.bin
b3df4715d3d10d222cd03830af22d55d1fd09053c89107a65193d49beb578ea8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 18448 bytes

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