Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d132115cea16269…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 02:49:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 23ea8dae7cfd06c1f393a380121b0c60 SHA-1: 2461da0c631e56505eca167dc5388789bf085e3d SHA-256: 1d132115cea16269e0a82346ce86c749f7c68723c2d642de1b0c00a072331104
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a visual call-to-action, strongly suggesting it is designed to trick users into downloading a malicious payload. The heuristic for a password-protected archive lure indicates that the downloaded content may be encrypted to evade initial security checks. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/hack-roblox-speed-game-hack PDF link annotation
    • http://elibrary.uniyap.ac.id/repository/free-roblox-toy-codes-unused_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-roblox-hacks-net_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-apocalypse-rising-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/case-clicker-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/hack-roblox-pc-aimbot-download_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-obby-no-password-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/download-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-printable-roblox-coloring-pictures_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/roblox-csgo-free-skins_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/los-mejores-hacks-nuevo-en-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/keyword-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/youtube-free-robux-codes-urban420_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-exploit-yoru-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/how-to-get-rainbow-wings-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-without-phone-number_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-pets-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.uniyap.ac.id/repository/free-robux-without-human-verification-or-survey-2021_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_004_off000053e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53E7 26372 bytes
SHA-256: 63230fb603a7a3e66a53da6e1dbd3dfaa1f5539d7b17ca2343beb4dd2fd1dab6
font_01_sfnt_off00008ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EE4 18532 bytes
SHA-256: c1319541e07d61f0d2521e1047f69b5665e70ef410382736e5d6ef8114d9e22f

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