Malicious PDF — malware analysis report

Static analysis result for SHA-256 90874b0da06376f8…

MALICIOUS

PDF

43.4 KB Created: 2021-05-14 08:31:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 77bb4287cb8ceb05a4b46eeafbb370df SHA-1: c5c2566fd971b85d72e1e0d338d2907bb2a6b468 SHA-256: 90874b0da06376f8ca607cf90e270746f64cb68d4140e72c999c90adcc8f7c78
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 a call-to-action phrase, directing users to click on embedded URLs. The primary URL, 'https://netcdn.xyz/app/431946152/how-do-u-get-free-robux-game-hack', is likely intended to deliver a malicious payload or redirect to a phishing site. The document's structure and content suggest it is designed to trick users into executing further malicious actions, potentially involving exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-do-u-get-free-robux-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/update-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-much-robux-can-you-get-with-1-million-dollars_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_off000048c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C0 26916 bytes
SHA-256: a2a45021a21d932f47e4aaa2065d35547c87b133d26d67bf6caea4ae12a49a17
font_01_sfnt_off00008607.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8607 18636 bytes
SHA-256: ab6f51fdb1eed883fd21dff3bd0336e3a1b816e6c21a8924207bfe84ed9a007e

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