Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a0cfd135c5d507d…

MALICIOUS

PDF

48.5 KB Created: 2021-05-31 13:13:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 777990ecd96a1f5f9449758ee9ecf455 SHA-1: 6a2d79f758527acc2018e0b9a418501b178fc9fa SHA-256: 6a0cfd135c5d507da7f6100f3e4f031362c4e57a8c17a156b8ee22b1a3346dd2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are part of a link farm designed to appear as SEO content for game hacks and free items. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point towards a malicious document designed for user redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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.xyz/app/431946152/where-to-find-roblox-hacks-game-hack
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/tiktok-likes-free_GM835599320.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/minecraft-pe-free-download-ios-no-jailbreak_GM479516143.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/coin-master-free-spins-and-coins_GM406889139.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-tiktok-followers-instantly_GM835599320.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-robux-no-human-verification-no-survey_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/minecraft-games-to-play-for-free_GM479516143.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-tiktok-fans-and-likes_GM835599320.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/get-free-robux-2021_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/caught-my-mom-cheating-in-roblox_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-minecraft-resource-packs_GM479516143.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/hack-for-roblox-wont-gey_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-minecraft-for-free_GM479516143.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/coin-master-free-spins-link_GM406889139.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/free-spins-coin-master_GM406889139.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/how-to-get-free-coins-on-assassin-roblox-2021_GM431946152.pdf
    • https://bibliopolis.be/wp-content/uploads/fsqm-files/minecraft-pe-free-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005562.bin
648083aafa2af845ea9ef54d89e373b2b48c2e7968dd83af1ac4d6bb356a78be		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5562 24772 bytes
font_01_sfnt_off00008ec9.bin
889cfc2fd0afa9ea114d6666204c6ce0548d0aae2cba345827d317498c4c06bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC9 2984 bytes
font_02_sfnt_off000098f4.bin
fc058fa3a42e639ab73bef15e145d75181f9a19969cca983b599aee9464ef65a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98F4 19004 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.