Malicious PDF — malware analysis report

Static analysis result for SHA-256 db93f508e9a56cc7…

MALICIOUS

PDF

43.7 KB Created: 2021-05-12 09:05:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5361f1f12164c36d1b160b591b633367 SHA-1: 38b5d34b0bb22911a31dc8c41417cbcb027e8f27 SHA-256: db93f508e9a56cc7854fc80272fd0e618fbd55622fc46c65eeec4cf9a0838af5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a lure for free Robux, indicating a phishing or scam attempt. The presence of an external URI and the ML classifier's high confidence score suggest malicious intent, likely to trick users into downloading a second-stage payload. No scripts were extracted, but the document's structure and embedded URLs point towards a social engineering attack.

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/how-to-get-free-robux-on-computer-game-hack
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/give-me-free-robux_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-apk_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-com-free-robux_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-link-spin_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-link-spin_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/abd-roblox_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/spin-free-coin-master_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coins-coin-master-2021_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/withdraw-robux_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/games-on-roblox-that-give-you-free-robux_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-2021-app_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/blogspot-coin-master-free-spins_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-hack-2021_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-twitter_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/get-free-spins-coin-master-october-2021_GM406889139.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/grab-points-login_GM431946152.pdf
    • https://pedungan.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000487a.bin
54fe74e1e73e7bff9d66a16f9df6b8bc86b16034f2f4795877feea2c120a305f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487A 26636 bytes
font_01_sfnt_off00008744.bin
2c87d7c74b7bcd7fade186f781764640e14dfaf637cd5e280742c056ede93ace		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8744 18716 bytes

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