Malicious PDF — malware analysis report

Static analysis result for SHA-256 7467c0bbcffcfa47…

MALICIOUS

PDF

48.9 KB Created: 2021-04-26 02:12:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c5e98e4ebdd61cab59658fb536f2eca6 SHA-1: b442d0970bb5d157e7f84e19a900e6a98d3ab382 SHA-256: 7467c0bbcffcfa47667fbe91330f867516b6a27ff92e628a8e71c83e5f3253bd
82 Risk Score

Malware Insights

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

The PDF file contains a lure impersonating Microsoft, directing users to download a "Roblox Btool Hack" from a suspicious URL. The ML classifier strongly flagged this PDF as malicious, and the embedded URI points to a known malicious domain. While no scripts were explicitly extracted, the nature of the lure and the embedded URI suggest an attempt to deliver a second-stage payload, likely a downloader or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 4

  • 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/roblox-btool-hack-ultmate-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/roblox-btool-hack-ultmate-game-hack PDF link annotation
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/reversal-hack-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/hack-roblox-with-lucky-patcher.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/adopt-me-hack-tool-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-robux-actually-works-2021.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-cheat-in-minerh-eaven-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/are-there-any-roblox-hacks-that-actually-work.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-coloring-pictures-for-roblox.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-robux-monte.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/free-roblox-proo-codes.pdfIn PDF document text
    • http://www.nlcitychurch.org.hk/upload/userfiles/files/how-to-get-free-stuff-in-catalog-roblox-2021.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_off000045da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45DA 39824 bytes
SHA-256: 289c0265c9928f79ff17fd94dc49fa77fd47b32262752efc9343d8a8f0f81357
font_01_sfnt_off00009cd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD9 18732 bytes
SHA-256: ed83bee0849f2583c1c958c96a093714680d8444d895e7925700ccd7fd7971bc

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