Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74803bd34b1dd05…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 02:35:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eeaef23fb2bcc97234939e0d5f616b8a SHA-1: 23d1063c559963288e76a82c5341871a6fec9436 SHA-256: e74803bd34b1dd05e142eb18faa7c60572b2c0a3468a0387679bbd2d6fc2be93
122 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and impersonates Facebook to encourage users to click on a malicious URL. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URL, https://netcdn.xyz/app/431946152/is-roblox-free-on-nintendo-switch-game-hack, is likely intended to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/is-roblox-free-on-nintendo-switch-game-hack.
  • 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/is-roblox-free-on-nintendo-switch-game-hack PDF link annotation
    • https://www.wco.org.uk/uploads/files/files/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/facebook-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/roblox-weird_GM431946152.pdfIn PDF document text
    • https://www.wco.org.uk/uploads/files/files/free-domain-for-minecraft-server_GM479516143.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
font_00_sfnt_off00004af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF6 25464 bytes
SHA-256: 16e5b08e19d2cbe55e1bc3add19c3840ad6e31ae2cc9c385f680199099f85d9b
font_01_sfnt_off000084a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A8 18676 bytes
SHA-256: 0355fc141c5901985405d6ccc218732ea46d01f7e960bb3eb1147f2b88eb9437

Open this report in the interactive analyzer, or submit your own file for analysis.