Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4b5618723861b6…

MALICIOUS

PDF

44.2 KB Created: 2021-06-11 09:10:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cb5d861a602b0189e96161f4820476fc SHA-1: c83734ee8a18cd684ec018752955487f24d828c6 SHA-256: ff4b5618723861b689cceb7be6c5c42fbd87e3cee33aa8b836aa3fcfdf5f2541
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action lure, suggesting it is designed to trick users into downloading malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple suspicious URLs related to game hacks and free in-game currency further supports this assessment. No scripts were extracted, but the document's structure and embedded links indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/add-free-robux-game-hack
    • http://library.umla.ac.id/repository/daily-free-spin-coin-master-link_GM406889139.pdf
    • http://library.umla.ac.id/repository/roblox-18_GM431946152.pdf
    • http://library.umla.ac.id//repository/free-robux-no-apps_GM431946152.pdf
    • http://library.umla.ac.id//repository/play-coin-master-for-free_GM406889139.pdf
    • http://library.umla.ac.id/repository/free-roblox-avatar_GM431946152.pdf
    • http://library.umla.ac.id/repository/roblox-skin-free_GM431946152.pdf
    • http://library.umla.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdf
    • http://library.umla.ac.id/repository/get-robux-for-free-real_GM431946152.pdf
    • http://library.umla.ac.id//repository/minecraft-cracked-client_GM479516143.pdf
    • http://library.umla.ac.id//repository/coin-master-card-collection-hack-2021_GM406889139.pdf
    • http://library.umla.ac.id//repository/coin-master-attack-block-hack_GM406889139.pdf
    • http://library.umla.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdf
    • http://library.umla.ac.id//repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://library.umla.ac.id/repository/minecraft-texture-packs-free-download_GM479516143.pdf
    • http://library.umla.ac.id//repository/roblox-free-followers_GM431946152.pdf
    • http://library.umla.ac.id/repository/free-robux-no-survey_GM431946152.pdf
    • http://library.umla.ac.id//repository/free-robux-on-iphone_GM431946152.pdf
    • http://library.umla.ac.id/repository/minecraft-book-collection_GM479516143.pdf
    • http://library.umla.ac.id/repository/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://library.umla.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005054.bin
f9635f796251f184326549159c2d1d86812a76b233d15c2c9b1f8e11f68f1b1a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5054 25012 bytes
font_01_sfnt_off00008a87.bin
4d1a2dafdd57af4e11fea6bc1129b321e827e0325e7699c740dcf1d48055a8aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A87 18188 bytes

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