Malicious PDF — malware analysis report

Static analysis result for SHA-256 65848651c331080b…

MALICIOUS

PDF

41.9 KB Created: 2021-04-30 18:44:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c8f47405e50e61d24fd46250f8b07c7c SHA-1: 512afb81990e7a4eee3fed50fd76a4a2ae65d7e4 SHA-256: 65848651c331080b9fbd340b4c661fc696c81be049d61d6381a2a01174182a8b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external resources, many of which are related to game exploits and cheats. The presence of a security bypass heuristic suggests an attempt to trick the user into disabling protective measures, likely to facilitate the download of malicious content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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-cheat-in-roblox-robux-2021-game-hack PDF link annotation
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/blue-hacks-team-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/earn-robux-today-free.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-hack-on-roblox-with-cheat-engine-64.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/counter-blox-roblox-offensive-how-to-get-free-skins.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-free-boombox-games.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/hack-account-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/how-to-use-a-cheat-on-roblox-jailbreak-2021.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/free-base-terrain-roblox.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/roblox-cheat-engine-how-to-give-yourself-a-gear.pdfIn PDF document text
    • http://www.technibuild-group.com/uploaded_files/userfiles/files/sex-cheat-codes-roblox-sound-id.pdfIn PDF document text
    • https://freerobux.cyouIn 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_off00004172.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4172 27224 bytes
SHA-256: f812321298434bf7d68d238a2e62dad6ea54bb2fafeaff86e255296dbf356963
font_01_sfnt_off00007fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FD9 18988 bytes
SHA-256: abfff2fcdb7ed58ae824322e77ed6c97d76045d4b16284ecdbf3fcea13b6d758

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