Malicious PDF — malware analysis report

Static analysis result for SHA-256 67cf69bf4d7a21fd…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 00:11:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 98329e00098a18f7950aadd28597f766 SHA-1: 41094a50aaea2b158fbf6298bd64eb7e38fea207 SHA-256: 67cf69bf4d7a21fd6f2294c2689222beeca63dbc1c26e144ef996154cd828cb8
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to lure the user into downloading a payload, likely related to free game items. The embedded URL https://netcdn.xyz/app/431946152/free-roblox-gear-game-hack is a primary indicator of this malicious activity. The ML classifier also strongly flagged this PDF as malicious.

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/431946152/free-roblox-gear-game-hack PDF link annotation
    • http://www.exikom.com.ua/images/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/hack-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/robux-codes_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/how-to-get-more-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/roblox-executor-free_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://www.exikom.com.ua/images/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://www.exikom.com.ua/images/game-give-free-robux_GM431946152.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_off0000488f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x488F 25484 bytes
SHA-256: 1c29bbcb81027b0e0f0560bcca2e9a521776f5eaad0fea680403053b16800955
font_01_sfnt_off000083ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83AB 18176 bytes
SHA-256: 6ea9eee9688bd29c5e0b74536b9be2ab390210d742e4038285307cb30709fc72

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