Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ad1b4d090a90758…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 13:47:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 64a1338731da4816e8d3bd76322c0e98 SHA-1: 434bb45973ef1185831e9ed47ce2eb72acb270f9 SHA-256: 2ad1b4d090a907589aa084e7de094948cd0ba00569f04cf57501f3a1a9ee7192
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that explicitly mentions "free hair Roblox" and "free robux hack generator", indicating a lure for game-related cheats. The presence of a "Password-protected archive handoff" heuristic suggests the document is designed to trick users into downloading an encrypted payload, likely containing malware. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/431946152/free-hair-roblox-game-hack
    • http://librarysenior.com/repository/websites-that-give-you-free-robux_GM431946152.pdf
    • http://librarysenior.com//repository/robux-earning-sites_GM431946152.pdf
    • http://librarysenior.com//repository/free-robux-hack-generator_GM431946152.pdf
    • http://librarysenior.com//repository/hack-a-game_GM431946152.pdf
    • http://librarysenior.com/repository/i-cant-get-free-spins-coin-master_GM406889139.pdf
    • http://librarysenior.com/repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://librarysenior.com//repository/free-robux-stream_GM431946152.pdf
    • http://librarysenior.com//repository/roblox-getting-hacked_GM431946152.pdf
    • http://librarysenior.com/repository/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://librarysenior.com/repository/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://librarysenior.com/repository/roblox-password-hacker_GM431946152.pdf
    • http://librarysenior.com//repository/coinmaster-spin-ml-free_GM406889139.pdf
    • http://librarysenior.com/repository/get-more-free-spins-on-coin-master_GM406889139.pdf
    • http://librarysenior.com/repository/free-roblox-card-codes_GM431946152.pdf
    • http://librarysenior.com//repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://librarysenior.com//repository/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://librarysenior.com/repository/roblox-hacked-com-2021_GM431946152.pdf
    • http://librarysenior.com//repository/coin-master-free-2021-spin-link_GM406889139.pdf
    • http://librarysenior.com/repository/install-free-game-coin-master_GM406889139.pdf
    • http://librarysenior.com//repository/robux-xyz_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f28.bin
c5c3e1e1e98c2c45e558f5773b9b94259c2b43bb726f81f2b2b64594a8429dd4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F28 25416 bytes
font_01_sfnt_off000089e3.bin
a0599e440df83d1220524ed19e510b9c2f6a3db0fbd0aff9e889db947f6eea7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89E3 18296 bytes

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