Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b44e8bd92d716f…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 19:56:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d2ee727f21a1d72c4a19bf600c9a1e0b SHA-1: 17b073b37f5a6ee4a4ebea8592e17943b6952aeb SHA-256: 26b44e8bd92d716f5b64ed0cd079ab98dc1b2817ceb0ba1efc32731db23de474
102 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a prominent external URI pointing to a 'free robux game hack'. The presence of a 'password-protected archive lure' heuristic suggests the document is designed to trick users into downloading a password-protected file, likely to bypass security scanning. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • 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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/rbx-free-robux-game-hack
    • http://library.stieyapan.ac.id//repository/free-roblox-passwords_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/roblox-got-talent-piano-hack_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/free-robux-real_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/cute-free-roblox-outfits_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/robux-free-com_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/coin-master-twitter-free-spins_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/pokemon-go-free-quickest-charge-moves_GM1094591345.pdf
    • http://library.stieyapan.ac.id//repository/minecraft-hacks-for-2b2t_GM479516143.pdf
    • http://library.stieyapan.ac.id/repository/today-free-spin-coin-master_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/free-robux-cards_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/rbxdemon_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/coin-master-card-hack-app_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/coin-master-apk-hack-2021_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/coin-master-blogspot_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/real-free-robux-codes_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/roblox-play-now-for-free_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/free-minecraft-server_GM479516143.pdf
    • http://library.stieyapan.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/tiktok-free-jazz_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050c8.bin
02e7669fb9b7badd78b0fb7672b42171061fdb6d6faf744151e1d23e85e53b9f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50C8 25000 bytes
font_01_sfnt_off00008a21.bin
03f7603bc8a5695bbd0c39958af3fcfd5a932cbc13eba7563a8e8ca8b5ca4208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A21 18012 bytes

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