Malicious PDF — malware analysis report

Static analysis result for SHA-256 d96cdc7358c090f3…

MALICIOUS

PDF

44.8 KB Created: 2021-06-10 13:19:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: de4533eb91f8041eb399a62cac32a33a SHA-1: 0a11f0b0ec82fc89cd4236372c09fda1d5a760c4 SHA-256: d96cdc7358c090f3d728de8ea09064490a328dbd23c324c4aa5e53e3dddd063a
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 structured as SEO-optimized PDF links pointing to game-related hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs suggests a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a social engineering tactic to drive downloads.

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.tw/app/431946152/roblox-vehicle-tycoon-cheats-game-hack
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/free-robux-com-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/minecraft-pe-free-download-android_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-hack-download-android_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-accounts_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/www-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-blogspot-links_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spin-link-new_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/get-free-robux-without-doing-anything_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-heaven-free-spins-link_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/hack-coin-master-link_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-hack-spins-ios_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/sites-for-free-spins-for-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-roblox-app_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/bloxawards-com-earn-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-spins-on-coin-master-generator_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-today-haktuts_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-without-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f9f.bin
a951d2b044a2f1669a488eb14c89b988e4710044fbafe68296ad0afb99f3681d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9F 25720 bytes
font_01_sfnt_off00008b3c.bin
65959c86a56ce8c809ab2e89a2a0ee7624531a758a659780662e194c1d2c6902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B3C 18716 bytes

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