Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c10ee9e29d8b3e4…

MALICIOUS

PDF

41.3 KB Created: 2021-04-29 11:41:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f9a944e51b20c8cf7d6d7ee7ffc2568a SHA-1: 2a25cb2d2b603cc1e5213c430c263a92014b8987 SHA-256: 2c10ee9e29d8b3e4e4f8b73dfb664ac2b90854c5196054ee02abe38b89e1bc68
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document impersonates Netflix to trick users into clicking a link for a "Robux Hack". The embedded URL and numerous other URLs point to suspicious PDF files related to game exploits, suggesting a credential phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/robux-hack-no-human-verification-2021-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/robux-hack-no-human-verification-2021-game-hack PDF link annotation
    • http://karolinaherrera.com/images/roblox-scripting-free-help.pdfIn PDF document text
    • http://karolinaherrera.com/images/roblox-jump-hack.pdfIn PDF document text
    • http://karolinaherrera.com/images/how-to-get-free-robux-using-javascript.pdfIn PDF document text
    • http://karolinaherrera.com/images/free-roblox-robux-generator-no-survey-hack-tool.pdfIn PDF document text
    • http://karolinaherrera.com/images/free-roblox-body-parts.pdfIn PDF document text
    • http://karolinaherrera.com/images/how-to-code-roblox-hacks-python.pdfIn PDF document text
    • http://karolinaherrera.com/images/free-robux-page-demo.pdfIn PDF document text
    • http://karolinaherrera.com/images/one-item-that-mskes-everything-in-catalog-free-for-roblox.pdfIn PDF document text
    • http://karolinaherrera.com/images/free-roblox-promo-codes-november-2021.pdfIn PDF document text
    • http://karolinaherrera.com/images/how-to-hack-in-roblox-without-cheat-engine.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_off00004033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4033 26532 bytes
SHA-256: 55214146e633d46bf5844badb0f658910fcf0858c9255aca1e6850f0815e33f0
font_01_sfnt_off00007c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9F 19268 bytes
SHA-256: 74e7b5d6adb78676e82ac11a5a67265f6ddeb53fd788dfc0a622cc481ea6a7c7

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