Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a1898f9dad2342a…

MALICIOUS

PDF

35.5 KB Created: 2021-06-26 19:39:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 408b1b4fda560242fdb9faae86519798 SHA-1: 1918f1bd60914124269282f5466a9bce42b59a31 SHA-256: 4a1898f9dad2342a4fd0caa6f7a03d4ff416d6767c748a47a3d2733913fb2e64
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple lures related to Roblox account hacking and free Robux, directing users to download an application from a suspicious URL. The presence of embedded URLs and a high ML classifier score strongly indicate malicious intent. The document's content and embedded URLs suggest it is part of a phishing campaign to trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-account-hack-system-game-hack
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-roblox-money_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/huskybuckscom-free-robux_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-hack-generator_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-hack-accont_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-robux-no-human-verification-android-2021_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-games-for-free-for-kids_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-free-items-2021_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-getting-hacked_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-robux-easy_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-download_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/wurst-client-112-2_GM479516143.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/roblox-free-unlimited-robux-glitch_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/robux-sites_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/free-t-shirt-roblox_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-game-hacking-tricks_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/hack-download_GM431946152.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/minecraft-education-free_GM479516143.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/coin-master-hack-apk-35-8_GM406889139.pdf
    • https://www.vizyonproduction.com/application/uploads/assets/files/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003332.bin
7c36e96453f9a7aedc9eef88995de76a85e929a371a7cdd0170a8e8d177a1da9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3332 22440 bytes
font_01_sfnt_off000064d3.bin
e7a073835d5aadf9373aa9022d1f444c55b4086ca531e069cf39862a1e5b09a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D3 19340 bytes

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