Malicious PDF — malware analysis report

Static analysis result for SHA-256 490091d6319fc0d3…

MALICIOUS

PDF

35.0 KB Created: 2021-06-26 13:33:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6218383222546b1e5d747cda373207ce SHA-1: 0299440bc9e9bb6617991438e3e0c6c3674843b2 SHA-256: 490091d6319fc0d3fe8050c48442a30b026b2b27cb65a849f0a0d729c38f1638
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous embedded links, many of which are presented as 'SEO link farm' content related to game hacks and cheats. The primary URL, http://netcdn.co/app/431946152/how-to-load-your-hacks-roblox-game-hack, likely serves as a lure to download a secondary payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-load-your-hacks-roblox-game-hack PDF link annotation
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/games-like-roblox-and-minecraft-but-free_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-undertale-game-script-hack_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-in-app-purchases-roblox-pc_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-robux-plz_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-flood-escape-2-hacks_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/terminal-railways-have-a-train-free-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/roblox-robux-hack-online-generator-tool-no-download_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/sysnaspe-crack-free-2021-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/coin-master-hack-xyz-apk-download_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/como-conseguir-robux-gratis-2021-sin-hack_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • https://elearning.nurulhuda.sch.id/__statics/gudangsoal/files/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B6 22280 bytes
SHA-256: 1ac8ad3050c6b4996c41f84b578e5fab02a4144bf6f826bacfa8cfadfee5d09d
font_01_sfnt_off000062ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62ED 19296 bytes
SHA-256: 53493a8504e3fcc12b20f194e7abf6e2e83644d35abdd22dbebcf5a1b95f1448

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