Malicious PDF — malware analysis report

Static analysis result for SHA-256 4daa592295b8d3de…

MALICIOUS

PDF

42.4 KB Created: 2021-04-30 14:12:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5957deb8bea337077a48e9a6935cd4ad SHA-1: 5415404bfd1d27c4c6fa9003adbaa6ae942a4a1e SHA-256: 4daa592295b8d3de44eb954bf7c05b6e71e4c606897e0140b2c1898f1db24a25
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains a lure related to 'Free Robux' and impersonates Apple, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to trick users into visiting malicious sites, likely for credential harvesting or further payload delivery.

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/websites-that-will-give-you-free-robux-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/websites-that-will-give-you-free-robux-game-hack PDF link annotation
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/infinite-jump-roblox-cheat-download.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/free-old-roblox-games.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-masks-in-roblox.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/trolling-outfits-roblox-free.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-get-flyable-pets-in-roblox-free.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/hack-builderman-roblox.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/free-kakashi-outfit-roblox.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/todos-los-juegos-de-roblox-hack.pdfIn PDF document text
    • https://hullerkopipagaralam.com/ckfinder/userfiles/files/how-to-have-free-faces-on-roblox-2021.pdfIn PDF document text
    • https://www.hullerkopipagaralam.com/ckfinder/userfiles/files/i-want-to-break-free-roblox-music-code.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_off000044e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x44E2 26216 bytes
SHA-256: 7da6126358234a31b310016edcf926c68737ba4f8ab091aeea7fe3acb55b2ce1
font_01_sfnt_off00008186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8186 19180 bytes
SHA-256: c15f8470240d9989c02af083265c07cdd6bc9e1098ae6aa7c146c7857c457530

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