Malicious PDF — malware analysis report

Static analysis result for SHA-256 6357452ae762cc01…

MALICIOUS

PDF

41.0 KB Created: 2021-04-28 00:18:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 464b2b79e0c9928f2f6c84de4ddcc4dc SHA-1: ad8d703594ab8fc0157212b6fc766ebb062f077f SHA-256: 6357452ae762cc019a79aa89a05dabd3f8ad955edfdb4ba35ead038043b90f69
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link T1204.002 Malicious Link

The PDF document contains a lure for free Robux, impersonating Apple and directing users to a credential phishing site hosted on netcdn.xyz. The ML classifier strongly indicated maliciousness, and the presence of multiple related URLs further supports this. No scripts were extracted, but the document's structure and embedded URLs clearly indicate a phishing attempt.

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/how-to-get-free-robux-melissa-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/how-to-get-free-robux-melissa-game-hack PDF link annotation
    • https://lib-stie.yai.ac.id/repository/tiny-tanks-cheats-roblox-2021.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-group-finder-free-download.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robuxian-free-robux-code-generator.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-team-switch-hack.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hack-site.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-hacks-p.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/blaze-games-co-free-robux.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-robux-hack-online-generator-tool.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/elemental-battlegrounds-roblox-hacks.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/robux-cheat-in-roblox.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_off00004174.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4174 26212 bytes
SHA-256: aeedf536b35622a21e9799a3eb2b5496e27bb9024f3ff3113e3ccd37c8d9ee1c
font_01_sfnt_off00007cd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD5 18900 bytes
SHA-256: 771b2ad9be836486b79013be13109815e022027bb52853873596add6d1aa329f

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