Malicious PDF — malware analysis report

Static analysis result for SHA-256 1069f941d9f65198…

MALICIOUS

PDF

46.4 KB Created: 2021-05-10 17:37:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: cd3d6657967c4169eb19302d5a6e8f1b SHA-1: 58ba76b0bca5dfb63b31f13eda63d69849de9f82 SHA-256: 1069f941d9f651981bb5bf6343320d5f18955ab34a252f6b16ab334c1d9a0e6a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that point to external websites offering game cheats and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' model strongly flagged this PDF. The presence of a 'download button' lure further suggests a malicious workflow designed to trick users into navigating to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/406889139/free-spins-link-in-coin-master-2021-game-hack
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-android_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-robux-without-doing-anything_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/moonactive-free-spins-coin-master_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-robux-generator_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-robux-websites-that-actually-work_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/coin-master-60-spins_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free_GM479516143.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-builders-club_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/claim-coin-master-free-spins_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-spins-coin-master-app_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/free-coin-master-spins_GM406889139.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/boost9-com-roblox-hack_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdf
    • https://elearning.mtsn1batam.sch.id/__statics/gudangsoal/files/minecraft-116-apk-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000050b4.bin
826eeeec19b2a8b36ece5e5f31568dd107bb86b2bf09ea4c0cbb4d724a399311		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50B4 28648 bytes
font_01_sfnt_off000092ac.bin
8f5be0faf1f43547a4f613946690c49555a623d75ecb5c591eda2449b2cabce1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92AC 18456 bytes

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