Malicious PDF — malware analysis report

Static analysis result for SHA-256 21ea6a9007e3849b…

MALICIOUS

PDF

40.4 KB Created: 2021-04-26 07:07:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 86790eeebbccc493ee0f873378eaa84a SHA-1: 8b67b3f178cec45a5015b5cffca0deaecfb0a970 SHA-256: 21ea6a9007e3849b4ce228b02ec0f06ad3c1cd489dba46222a528137edf706bd
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent call-to-action link impersonating PayPal, directing users to a URL associated with Roblox hacks. This strongly suggests a credential phishing or malware distribution attempt. While no scripts were explicitly extracted, the ML classifier and brand impersonation heuristics indicate a high likelihood of malicious intent.

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/all-free-hair-roblox-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/all-free-hair-roblox-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/roblox-noclip-hack-december-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-ultimate-driving-money-cheat.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-buying-roblox-pastebin.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-stuff-for-free-on-roblox-catalog.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/can-you-get-away-with-hacking-on-roblox.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-installer-mac-free.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-empty-roblox-accounts.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-block-piece-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-earn-free-robux-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/80-robux-free.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_off00003fc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3FC5 26528 bytes
SHA-256: 2d22ca1c0c32c064c17dc4d89004c7bb7bc50e9fff8e5776799ad2f1c86d8f4a
font_01_sfnt_off00007c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C34 18296 bytes
SHA-256: bb37af3ff0794bae78187322ced2bcc252f68599f85d3df705fb419140cc74b1

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