Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4ff8dfba4bc367…

MALICIOUS

PDF

40.2 KB Created: 2021-04-28 13:01:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9fedc71a82d844ec755512fd7366eb1f SHA-1: 927416d9ce63e9634db66fab86f9c7326f34a530 SHA-256: 9e4ff8dfba4bc3675274451919c76aa778c3c1a1e33bd170b9beaaa0bb60d3b7
82 Risk Score

Malware Insights

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

The PDF document contains multiple heuristics indicating malicious intent, including an ML classifier flagging it as malicious and a lure for browser extension installation. The document body and embedded links suggest a social engineering tactic to trick users into downloading a file, likely a malware payload, by posing as a game cheat or generator. The presence of numerous suspicious URLs related to game exploits further supports this.

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-admin-logo-roblox-game-hack PDF link annotation
    • http://wattkit.com/images/free-tdm-shirt-roblox.pdfIn PDF document text
    • http://wattkit.com/images/how-to-get-the-riding-pass-for-roblox-free.pdfIn PDF document text
    • http://wattkit.com/images/roblox-emergency-response-cheats.pdfIn PDF document text
    • http://wattkit.com/images/artmoney-hack-roblox.pdfIn PDF document text
    • http://wattkit.com/images/cheat-codes-roblox-mad-city.pdfIn PDF document text
    • http://wattkit.com/images/cheats-do-roblox-cs-go.pdfIn PDF document text
    • http://wattkit.com/images/dantdm-free-robux.pdfIn PDF document text
    • http://wattkit.com/images/free-stormtrooper-helmet-roblox.pdfIn PDF document text
    • http://wattkit.com/images/lingojam-roblox-hack.pdfIn PDF document text
    • http://wattkit.com/images/assassin-hack-script-roblox.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_off00003e65.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3E65 26308 bytes
SHA-256: ce11df71f6565bc6b8834c9e3ef8fec7432e44aee9881b6b37eecf728d7679dd
font_01_sfnt_off000079e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E9 18788 bytes
SHA-256: af2793e467c8adedf24da215d19fd7354a183ab0bb7d104f11015c3d021cca27

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