Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e62b0807eea3988…

MALICIOUS

PDF

42.2 KB Created: 2021-05-02 05:36:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9c6eb5dde9b5402029d3ca1fbc47c677 SHA-1: 8cb26e23cf36d0ca2ba1f95e49fd4a00cb874fa4 SHA-256: 0e62b0807eea39880602440b7ceb16ce767b41988da4c4e06c76cd3d4e699c6d
82 Risk Score

Malware Insights

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

The PDF document uses social engineering tactics, specifically a lure related to 'Free Roblox Items', to trick users into clicking malicious links. The presence of a 'Browser Install Lure' heuristic and embedded URIs pointing to suspicious domains strongly suggests an attempt to deliver a secondary payload or facilitate credential theft. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/free-roblox-items-on-catalog-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/free-rich-robux.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-speed-hack-2021-pet-simulator.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-free-girl-body.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/getbucks-free-roblox.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-generator-no-virus.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-do-you-hack-roblox-jailbreak.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coolest-free-roblox-items.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hack-no-verification-no-survey.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/muscle-simulator-roblox-cheat.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-any-way-to-make-robux-for-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_off00004420.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4420 27408 bytes
SHA-256: e1375c31d8f8d74de7c3882fbcb06a731ca28e12b52533abde62fe991bf2cca5
font_01_sfnt_off000081c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81C8 18828 bytes
SHA-256: ea229a5f02f08581feeaf407202600f71042524f98f2bd6c5c5e7e7d264abddd

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