Malicious PDF — malware analysis report

Static analysis result for SHA-256 54340f2ac7deb7ad…

MALICIOUS

PDF

41.9 KB Created: 2021-04-30 07:52:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f6bbb50548e4173620bd1385c085b174 SHA-1: e7d799c7d5944212b0db5fad6520434d603ff013 SHA-256: 54340f2ac7deb7ad5980e254cfad64b85b7367c9ecc514b27b378dc216fe9c49
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to obtaining free in-game currency ('Robux') for the game Roblox. It includes a prominent external URI pointing to a suspicious domain, likely hosting a malicious payload. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests that the document may be instructing the user to open a password-protected archive, a common tactic to bypass security filters. No scripts were extracted, but the presence of external URLs and the lure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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-1-million-robux-game-hack PDF link annotation
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-hack-your-friends-account-on-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/groups-that-give-free-robux-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/best-free-items-in-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/como-usar-cheat-engine-no-roblox-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/rbx-points-free-robux.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-get-a-hack-client-for-roblox.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/como-tener-hacks-en-roblox-prison-life.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/roblox-free-accounts-2021.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/how-to-hack-roblox-jailbreak-for-vip-server.pdfIn PDF document text
    • https://www.regaloscabalgatas.es/ckfinder/userfiles/files/comment-hacker-roblox-facilement-sur-pc-2021-en-francais.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_off0000448e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x448E 26304 bytes
SHA-256: febcfdba72de9cf597944c7108c32dd27122919aedafc71c69d9b5aac86f0377
font_01_sfnt_off000080c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C6 18776 bytes
SHA-256: d80fb6a189167a4c8f1c0b348fbff0cb05e038e079a32d04a663fd697a7a75a2

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