Malicious PDF — malware analysis report

Static analysis result for SHA-256 64a1c1e2c13a6642…

MALICIOUS

PDF

42.2 KB Created: 2021-05-17 06:39:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eb426f50e9e92cc5a2faf72e3aa38610 SHA-1: 575f2225d790eca91c041322ba1b8ea33cc26bf6 SHA-256: 64a1c1e2c13a66423ed3d56e81bf681847a4678f9e3e3af631302fff0c3e5186
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'link farm' structure, strongly suggesting a phishing or scam attempt. The document body and extracted URLs explicitly mention 'infinite Robux' and 'game hacks', indicating a lure for users seeking cheats or exploits. While no scripts were directly extracted, the PDF structure and embedded links are indicative of malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/how-to-get-infinite-robux-game-hack
    • http://ekaterinakorneva.com/images/coin-master-coin-hack_GM406889139.pdf
    • http://ekaterinakorneva.com/images/collect-free-spins-coin-master_GM406889139.pdf
    • http://ekaterinakorneva.com/images/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://ekaterinakorneva.com/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdf
    • http://ekaterinakorneva.com/images/coin-master-hack-tool-without-verification_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-earn-free-robux_GM431946152.pdf
    • http://ekaterinakorneva.com/images/real-coin-master-hack-2021_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-hack-minecraft-pe_GM479516143.pdf
    • http://ekaterinakorneva.com/images/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://ekaterinakorneva.com/images/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://ekaterinakorneva.com/images/how-to-get-free-minecraft-windows-10_GM479516143.pdf
    • http://ekaterinakorneva.com/images/coin-master-free-spins-daily-link-updated_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdf
    • http://ekaterinakorneva.com/images/free-robux-generator-no-survey_GM431946152.pdf
    • http://ekaterinakorneva.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://ekaterinakorneva.com/images/how-to-use-wurst_GM479516143.pdf
    • http://ekaterinakorneva.com/images/cheat-codes-for-coin-master_GM406889139.pdf
    • http://ekaterinakorneva.com/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://ekaterinakorneva.com/images/how-to-get-free-robux-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004998.bin
a1b0c50332174e6a32ec13e9ba5feaa04824c68583b79937ce217f32c400823a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4998 24688 bytes
font_01_sfnt_off0000827c.bin
8217e2720e15cc92b3bb050ea8e30655d207dd8077634fd20a14500b8eab7772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x827C 18236 bytes

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