Malicious PDF — malware analysis report

Static analysis result for SHA-256 936883aad62720ea…

MALICIOUS

PDF

35.8 KB Created: 2021-06-26 16:17:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 63cde7b1f6ab754a4c98e2bf1e109ffd SHA-1: 8a9d9c55153a8af979e88755e6a3213337bacdee SHA-256: 936883aad62720ea9e6c176f4691405ee19452223bfa634ad336af94000394aa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF document contains numerous embedded links, presented under the guise of "Robux Hack" and similar lures, which strongly suggests an attempt to trick users into downloading malicious content. The heuristic firings confirm the presence of a link farm and external URIs, indicating a distribution mechanism for further payloads. No scripts were extracted, but the sheer volume of links and the ML classifier's high confidence point to a malicious intent to facilitate the download of additional malware.

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/robux-hack-no-survey-2021-game-hack
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/minecraft-free-online-unblocked_GM479516143.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-hack-clothes-roblox_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-jailbreak-how-to-get-free-radio_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/descargar-asshurt-v32-hack-para-roblox-torrent_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-apk_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-avatar-roblox_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-online-download_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-hack-your-friends-roblox-account-2021_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-robux-no-survey-no-human-verification-no-download_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-chromebook_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/no-human-verification-hack-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-tiktok-fans-no-human-verification-ios_GM835599320.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/robux-codes_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-download-2021_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-hack-org_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-bloxburg-free-money_GM431946152.pdf
    • http://elearning.mtsn1sintang.sch.id/__statics/gudangsoal/files/roblox-how-to-hack-stamper-tool_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033a3.bin
1c758d0a96aa15b58871b6360586c8271b18ea521cecb37f813a1b393edccfa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33A3 22392 bytes
font_01_sfnt_off0000656f.bin
48475d4f08049632c780709562fff0969fe423251cd47b39c88730580abe429b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656F 19416 bytes

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