Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5b54f0b1a28e5a…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 17:32:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 89560a7155382bf9fd48f7db1246e140 SHA-1: 890ec7483a42e3b8d157979ac736cd83ca7a5097 SHA-256: 7b5b54f0b1a28e5aa90bc5720c586cf0ab052efa111f7af80c65ec93866dcbec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a lure for downloading free game-related content, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The presence of external URIs and the 'password-protected archive' heuristic indicate that the document is likely a precursor to downloading and executing a second-stage payload, possibly disguised as a game hack or cheat.

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.tw/app/431946152/roblox-install-free-game-hack
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-com_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/roblox-account-selling-free_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-blogspot_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-on-computer_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/minecraft-windows-10-edition-hacks_GM479516143.pdf
    • http://lib.uho.ac.id/library//repository/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-uk_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/roblox-speed-hack_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/instant-free-spins-coin-master_GM406889139.pdf
    • http://lib.uho.ac.id/library//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • http://lib.uho.ac.id/library//repository/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • http://lib.uho.ac.id/library//repository/coin-master-hack-progamers_GM406889139.pdf
    • http://lib.uho.ac.id/library//repository/free-robux-no-survey-or-human-verification_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-2021-august_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/free-roblox-toy-codes_GM431946152.pdf
    • http://lib.uho.ac.id/library//repository/coins-master-hack_GM406889139.pdf
    • http://lib.uho.ac.id/library/repository/free-robux-bettergenerator-us_GM431946152.pdf
    • http://lib.uho.ac.id/library/repository/instagram-free-coin-master-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f31.bin
7a09b5b25e023c4df90209099c518e483beacfb09941a5f6132e3a3097c15ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F31 22520 bytes
font_01_sfnt_off00006159.bin
1d55b3fd9f6369f8e68c2ca1b9c300169a68fb96c94d2ac67d1ae5c18d40cf4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6159 18752 bytes

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