Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b72a99dc5d65f7e…

MALICIOUS

PDF

35.5 KB Created: 2021-07-01 07:15:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d5154aa676c8c50c0c7b12f03cd504a0 SHA-1: 6b77c3cb09488ebfbf4619cdf058b148e069869d SHA-256: 0b72a99dc5d65f7e1094c430862e89541cdc3153852f00f3c8acd5e7179bd358
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a document body that strongly suggests a lure for downloading malicious content, likely related to game cheats or hacks. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document may be instructing the user to decrypt a password-protected archive, a common tactic to bypass security scans. The ML classifier also flagged this PDF as malicious with high confidence.

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/diamond-roblox-hack-game-hack PDF link annotation
    • https://pustaka.widyakartika.ac.id/repository/free-robux-free-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-do-u-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-cheat-in-hole-in-the-wall-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-synapse-exploit-download-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/name-change-client-roblox-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-arsenal-hacks-mobile_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/levvvel-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-no-waiting-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-free-trial_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-gold_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-human-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/win-robux-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/new-code-elemental-wars-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-password-or-email_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/can-i-make-a-roblox-group-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/prison-life-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-human-verification-no-offers-generator_GM431946152.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_002_off0000309b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309B 23176 bytes
SHA-256: 06598d3e4f8131ccbf6ce3801e1c46200977df5912cc36ef32de3ae2e4eff796
font_01_sfnt_off000064e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 19380 bytes
SHA-256: 4ac6a21667e8b7d7c91032b3bed142d61793ca9e1625db9fcf76b9bca9a101bd

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