Malicious PDF — malware analysis report

Static analysis result for SHA-256 969c14d90ee78c6d…

MALICIOUS

PDF

49.1 KB Created: 2021-06-03 06:54:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3fb99dff7dc66cd915d759653e918221 SHA-1: 1c5a54f3cbc34f3ae67f9c0e49e7202a8d88deb2 SHA-256: 969c14d90ee78c6d4d685eb30d11796ff42d3771c9699f42f002b6419210e700
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are structured as SEO-optimized links to other PDFs, suggesting a link farm designed to drive traffic. One prominent URL points to a page about hacking Roblox, and another heuristic indicates a lure for password-protected archives. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs supports a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/431946152/how-to-hack-somebody-on-roblox-with-editthiscookie-game-hack
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-free-link_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-drop-master-free_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/minecraft-hack-client-download_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-hack-app-download-free_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/is-roblox-free-on-xbox_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/free-coin-spin-coin-master_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/roblox-exploit-download_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/how-to-get-followers-on-tiktok-for-free_GM835599320.pdf
    • http://libnh.stikesnh.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/roblox-army-free-robux_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdf
    • http://libnh.stikesnh.ac.id/repository/minecraft-free-no-virus_GM479516143.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/coin-master-game-free-download_GM406889139.pdf
    • http://libnh.stikesnh.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005399.bin
53a8ae462dee9c74b3176f035ad5093d4025044a28afebd28cb078fce4dad0e1		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5399 27532 bytes
font_01_sfnt_off00008fe6.bin
955f67b406fbbec05d672b95b629f36b6c362c3b45d60943b9c93d3ef2276540		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE6 2824 bytes
font_02_sfnt_off00009993.bin
74468498f6fab06a230064bc1626924d4cb403e1a29f5c0e6486ffdd1c104044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9993 19548 bytes

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