Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1c019807cb7d8fb…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 05:11:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 19c3ee66efcd84c1112ed2922fb046b2 SHA-1: ed97b4e698b4e2f35703f9cf42856b2a64956e1d SHA-256: e1c019807cb7d8fba9fead42f0461f38eb3fdc1b726158648dfac5ec4055e1a7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a document body that attempts to lure users with promises of free Robux, a common tactic for phishing and malware distribution. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to download further malicious content. Although no scripts were explicitly extracted, the document's structure and content indicate a malicious intent to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-only-username-no-human-verification-game-hack
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-free-bundles_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/how-to-get-free-robux-generator_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/minecraft-pe-free_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-discord_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-hack-to-get-robux_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/how-to-download-minecraft-for-free-on-pc_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/blox-supply-free-robux_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/minecraft-free-install_GM479516143.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-hacksco_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/free-robux-generator-2021_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-email-free-spins_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/tryrbx-site-free-robux_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-code-for-free-spins_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/free-roblox-accounts_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/roblox-free-download_GM431946152.pdf
    • http://perpustakaan.pa-dompu.go.id/repository/coin-master-cheats-and-hacks_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c33.bin
b422c78193ec1659c7fab8404747dd604667771ba92ad314df676c55ffb5b2c9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C33 24772 bytes
font_01_sfnt_off00008590.bin
0069d31deed1bc6c2f872d57868e98b772485fef1053c0a123ffd6dc6d604850		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8590 19300 bytes

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