Malicious PDF — malware analysis report

Static analysis result for SHA-256 867339ee440a690b…

MALICIOUS

PDF

42.3 KB Created: 2021-05-16 00:23:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 91d61ad54ab9a073f23395ec9c6e59ba SHA-1: 6c62df43bb1b83bf04c4d05c631726b204e664c2 SHA-256: 867339ee440a690b92a5ac77c7854f196fd9dd353b494d576ab1400ef60fc5be
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into interacting with a malicious link, likely leading to a download. The ML classifier strongly flagged this PDF as malicious. The embedded URL, https://netcdn.xyz/app/406889139/collect-free-spins-for-coin-master-game-hack, is the primary indicator of a potential payload delivery.

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/collect-free-spins-for-coin-master-game-hack PDF link annotation
    • https://library.fdk.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-mods-for-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-apk-mod-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-blog_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-minecraft-alts_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hack-spins-apk-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_off00004bfe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BFE 24428 bytes
SHA-256: e19d8f8c332823c6e58ef92f044d490473dc69c0b167da551d2173e6304e5cf5
font_01_sfnt_off000083f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F8 17960 bytes
SHA-256: 56908844ab102c912342fec259dbf5a97100868d5d877c05497f82053eb67f28

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