Malicious PDF — malware analysis report

Static analysis result for SHA-256 176e0375d0088679…

MALICIOUS

PDF

49.2 KB Created: 2021-06-10 16:45:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 94544ae54e2132cd2fc746e41f92ba39 SHA-1: 470be491123058eb9e57c95833174a89c9aebe37 SHA-256: 176e0375d00886797a3385b1320db7da5081beb8fb6e7c1aa0832c2a5098c6d3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to websites offering free in-game items and currency. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document with high confidence. The document body text and embedded URLs suggest a lure for users interested in game hacks, likely leading to phishing or scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/how-to-get-free-robux-free-and-easy-game-hack
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-spin-link-coin-master_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/village-3-coin-master_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-pet-food-links_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-key-free-spin_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/google-play-coin-master-free-spins_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-daily-bonus-hack_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/robux-cheat_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/robloxyahoo-hack_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-robux-promo-codes-2021_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spins-generator_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-earn-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-more-free-coins-on-coin-master_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-hack_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/microsoft-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-a-free-minecraft-server_GM479516143.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-link-spin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005324.bin
59b4a1405a3bb7e6349b66760eadfc98d0d8ee8be47939f2963e4ab9138ac464		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5324 31164 bytes
font_01_sfnt_off00009c0e.bin
aa4e15ec245e84ff4f7e72aedf9c15afd4b8e09dbe4bb103ec19c85c0957b50d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C0E 18864 bytes

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