Malicious PDF — malware analysis report

Static analysis result for SHA-256 103a23bef3027ffc…

MALICIOUS

PDF

42.1 KB Created: 2021-05-18 05:30:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9b753cba2353850006264e37f4c3f8ba SHA-1: 51c5cf1d6e647fce9ec025dae0d7612dc6d2935c SHA-256: 103a23bef3027ffc4e62fd7cb096c43cdb9300dbc7f3c8ff75a89092c06480eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA and includes a call-to-action phrase, strongly suggesting a social engineering lure. The embedded URL, https://netcdn.xyz/app/406889139/free-spin-and-daily-news-coin-master-game-hack, likely leads to a malicious website designed to trick the user into downloading further malware or providing sensitive information. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/free-spin-and-daily-news-coin-master-game-hack PDF link annotation
    • https://www.atrax.hr/files/free-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-hack-software_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://atrax.hr/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://www.atrax.hr/files/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • https://www.atrax.hr/files/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://atrax.hr/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://atrax.hr/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://www.atrax.hr/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C0 24900 bytes
SHA-256: 00642c62b1a798791fe617c9d8aadd1e33b49721a5532bb8e7f318fefa5c0e99
font_01_sfnt_off00008130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8130 18648 bytes
SHA-256: 1b97510549e3d8fe11dfd7453b1479af326f6ce77077d5a4dbd4033950bc4681

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