Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb9ad9d2c8b180e8…

MALICIOUS

PDF

42.6 KB Created: 2021-05-19 00:38:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0f729e36932f79a99de8e038668e92ea SHA-1: 22e1cf4e56a36d3a8ab68896da15f2d317401505 SHA-256: eb9ad9d2c8b180e8af9f9ed1f37bd24472ba6b26c3371754aaed685776daa24c
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA or verification prompt to trick users into interacting with it, a common tactic for social engineering. It contains multiple embedded URLs, including one pointing to 'netcdn.xyz', which likely serve as download locations for malicious payloads. The presence of these lures and external links strongly suggests an attempt to deliver malware.

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-robux-with-no-verification-game-hack PDF link annotation
    • http://schrichte.de/images/script-executor-roblox-free_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-spin-link_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/huskybuscom-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/prison-life-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://schrichte.de/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://schrichte.de/images/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://schrichte.de/images/coin-master-hack-spin-160-pro_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
font_00_sfnt_off000048f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48F9 24896 bytes
SHA-256: a21e0191f9cc0ecc270faa47dc5ad27807cb4159ce761796e686e642a8999a73
font_01_sfnt_off00008214.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8214 18964 bytes
SHA-256: 882e97bebd076dae688415b0184bb224dca7d5b64082a0b27c077a0c76cfc979

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