Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83974858b4d17e3…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 22:45:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8a396c9173b4bf0370b033332c0f3a54 SHA-1: 0f09b4ca1e17a64a94c7bbdb101e2132c0c73116 SHA-256: f83974858b4d17e3d10056172bcf68dab911c170db4f2677f2de03303cdd5956
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 links for popular games like Minecraft and Roblox. The presence of a 'download button' lure and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content. The document's structure and embedded links suggest it is part of a phishing or malware distribution campaign.

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/479516143/minecraft-svg-images-free-game-hack
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-robux-fast_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/pokemon-go-free-90hz_GM1094591345.pdf
    • http://library.fikes.upnvj.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • http://library.fikes.upnvj.ac.id/repository/roblox-free-skin_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-100-free-spins-on-coin-master_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/minecraft-building-hacks_GM479516143.pdf
    • http://library.fikes.upnvj.ac.id/repository/game-hack-coin-master_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-robux-app_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/best-free-minecraft-server-hosting_GM479516143.pdf
    • http://library.fikes.upnvj.ac.id/repository/how-do-we-get-free-robux_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/http-blackgamesus-coinmasterhack_GM406889139.pdf
    • http://library.fikes.upnvj.ac.id/repository/who-to-get-free-robux_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/games-that-give-free-robux_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/what-do-points-do-in-roblox_GM431946152.pdf
    • http://library.fikes.upnvj.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052f9.bin
026103ac03748eba982657f0bf6492251eac202b9aad7f8fd883b7dc01029c31		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F9 25604 bytes
font_01_sfnt_off00008d93.bin
a09b643334d2e6be4f3f41432578bfd2746235ab347d952591db22e0a7ac2c60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D93 18232 bytes

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