Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d67e578edf5282…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 15:43:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b7b4643c71b953f95020d2feda7dc100 SHA-1: 59648643012580f3f209cea113aae6841e174789 SHA-256: 23d67e578edf5282676f9fdcaa0fe22dd4e9b9ba4e9abac9075445ddeb5ed733
82 Risk Score

Malware Insights

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

The document presents a lure for free in-game currency or cheats, indicated by the document body and numerous embedded URLs. The presence of a 'ML_NYX_PDF_MALICIOUS' heuristic firing and a 'SE_MFA_LURE' suggests a sophisticated phishing attempt or a downloader for malicious content. The document's content and structure strongly indicate an attempt to trick the user into downloading a payload or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 http://netcdn.co/app/431946152/robux-generator-free-no-verification-game-hack PDF link annotation
    • https://duoledesign.com/image/data/files/roblox-muscle-simulater-cheat-codes_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-free-hair-on-roblox-mobile_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/my-boyfriend-is-cheating-on-me-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/pokemon-go-no-free-raid-pass_GM1094591345.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/unpatchable-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-backpack-free_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/rocash-free-robux_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/collect-free-spin-linms-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/pubg-uc-list_GM1330123889.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/roblox-free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/free-robux-website-games_GM431946152.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://duoledesign.com/image/data/files/how-to-hack-roblox-servers-2021_GM431946152.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
font_00_sfnt_off0000321b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321B 22300 bytes
SHA-256: 5d5be6887763e482c46f6cf137666bdd796888b907af95009a96f08ee0e1c395
font_01_sfnt_off000063e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E8 19072 bytes
SHA-256: 972697e511158f4ec84ebd0d597257ffda43d7517fe69e0f5d787f5afd039b51

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