Malicious PDF — malware analysis report

Static analysis result for SHA-256 e85a0a958e1707cc…

MALICIOUS

PDF

41.6 KB Created: 2021-04-30 14:08:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6136b6d8fe7da0a109ab0da0b98546b4 SHA-1: d99f402fea89e466305d92bd3867112222b90f0c SHA-256: e85a0a958e1707cc5815c687f420a017b50bea14a43740cde20b580ee4ae999a
82 Risk Score

Malware Insights

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

The PDF document employs a social engineering lure related to 'Free Robux' to trick users into downloading a secondary payload. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, which is a common method for malware installation. The embedded URLs point to potentially malicious PDF files, suggesting a multi-stage attack.

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-robux-august-16-2021-game-hack PDF link annotation
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-free-gamepass-scriopt.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-5-robux-for-free-2021.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/nike-vetement-de-roblox-free.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/is-hacking-roblox-a-crome.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-get-free-robux-only-on-computer.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-tell-if-your-roblox-account-is-hacked.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/buy-robux-free-2021.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/hack-roblox-knife-simulator.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/roblox-giftcard-code-free.pdfIn PDF document text
    • https://distribuidorademoveis.com.br/ckfinder/userfiles/files/how-to-hack-robux-2021.pdfIn PDF document text
    • https://robux-rank.comIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000413b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x413B 26144 bytes
SHA-256: 80d2933dad37f4a8d7c04a72369d98dd3e3d260d13821d8d91ac3c71026cc77b
font_01_sfnt_off00007eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EB2 18976 bytes
SHA-256: 8486e13d7923319f95a019c24195c21f9447ce3e5a88492b9b96b97c1f3af424

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