Malicious PDF — malware analysis report

Static analysis result for SHA-256 64b6ef799c665b7f…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 02:24:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5e662e825b4c0b2f1e95d7817924e424 SHA-1: c9e20858cbcc0fe85ba9dd9c16d31c39e262f552 SHA-256: 64b6ef799c665b7f668e07d5462c563182aedcfb113bd48840ad27fa031d44e7
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, directing users to websites offering game hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download' button lure reinforces the malicious intent. While no scripts were explicitly extracted, the structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/is-coin-master-hack-safe-game-hack
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-games_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/best-coin-master-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/earn-free-robux-on-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-mod-version-free-download-2021_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/minecraft-svg-images-free_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-app-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-2021-download_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/pokemon-go-free-mewtwo-hack_GM1094591345.pdf
    • http://muslib.unmus.ac.id//repository/games-that-give-you-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-daily-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-links-for-today_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-free-skins-on-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/free-multiplayer-minecraft-server_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050fd.bin
ee363c42f086a15d30a01282bdb8939a6fe87bfa22e95e7b0c80ad67abf56da3		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50FD 24884 bytes
font_01_sfnt_off00008a0c.bin
fe1f2daf970176796b30352a80040e1234ee7b6b28ca613a5dcb302da82e852c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0C 17716 bytes

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