Malicious PDF — malware analysis report

Static analysis result for SHA-256 c88247ebee1cbed1…

MALICIOUS

PDF

46.3 KB Created: 2021-05-17 16:30:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ac11ae63ba5f4f5c9bb7a116e187c061 SHA-1: 8aa389acd408d3990c3d2c86e1fe4e027ebbc9d2 SHA-256: c88247ebee1cbed16a2bcba94ee45c5607033ac064944c61df0f0a082d8ba8cf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which are structured as SEO-friendly URLs pointing to other PDF files. The primary URL, https://netcdn.xyz/app/431946152/com-roblox-game-hack, suggests a lure related to game exploits. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, likely intended to direct users to malicious content or phishing sites. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection to these external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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/com-roblox-game-hack PDF link annotation
    • http://www.vktzunami.cz/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://www.vktzunami.cz/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.vktzunami.cz/images/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49D7 26756 bytes
SHA-256: d8082963b52b39aa89c29e9693a7602805d17ff155e7db44294cc987984538c4
font_01_sfnt_off00008632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8632 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9344 18044 bytes
SHA-256: eff775d92ef8bd491319eac85ef909b2198b057cd93ad57b214b1357dcb648b5

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