Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba85ed3da49e7b5…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 14:06:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0f78271ed90f99e2344b311dda40d1ae SHA-1: 0c33a1fb3d21ed61e20b8c63ce47d8d84541afff SHA-256: 1ba85ed3da49e7b54971aae388616855564bd4a94b24ff301e5f38b3c8ca2e3e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and related to free game currency or accounts. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a lure. The document's content and structure point towards a phishing or scam attempt designed to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-game-hack
    • http://elibrary.uinbanten.ac.id/repository/free-roblox-accounts-with-dominus_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/minecraft-switch-free_GM479516143.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-no-verification-2021_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/dinero-infinito-en-bloxburg-roblox-hack_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/coinmaster-spins_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-coin-master-spins-and-coins-for-daily_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-spin-link-today_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-apk-hack-32_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-robux-scams_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/buy-robux-free_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/pokemon-go-free-download-game_GM1094591345.pdf
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-game_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/escape-prison-roblox-cheats_GM431946152.pdf
    • http://elibrary.uinbanten.ac.id/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://elibrary.uinbanten.ac.id/repository/can-you-get-minecraft-for-free-on-pc_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002ea3.bin
7bef301ea081e6bc4b8107dfc90c1f396e9173b6315adc98e05ff78ce9a8bd48		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EA3 22556 bytes
font_01_sfnt_off00006120.bin
2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6120 17996 bytes

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