Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6b9c1bd7fe50c5…

MALICIOUS

PDF

40.1 KB Created: 2021-07-03 12:04:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d99f6348f9bb6003b54222d0180e2874 SHA-1: 571d85dfce4467cc6568681af13b40e0b5ebf335 SHA-256: cb6b9c1bd7fe50c51d4bbfab0bbf03eada4c7eac972f0800303c27cbca4eb29c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that lead to sites offering cracked game applications and hacks, such as 'coin-master-cracked-apk-free-download-game-hack'. The presence of a 'SE_LOLBIN_RUN_COMMAND' heuristic firing suggests the document may attempt to execute commands, likely to facilitate the download or execution of these malicious payloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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.tw/app/406889139/coin-master-cracked-apk-free-download-game-hack
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/pubg-uc-quora_GM1330123889.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-unlimited-coins-hack-apk-download_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/earn-free-spins-for-coin-master_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/hacked-client-for-minecraft-bedrock_GM479516143.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-can-i-get-minecraft-for-free_GM479516143.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/robux-no-human-verification_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-hack-elemental-battlegrounds_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-back-accessories-roblox_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/minecraft-windows-free_GM479516143.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-free-mvp_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/roblox-free-printables_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/best-star-wars-maps-free-modeled-roblox_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/minecraft-free-no-virus_GM479516143.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/robux-premium_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/comandos-cmd-juegos-hack-roblox_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-ad_GM406889139.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-hack-using-cheat-engine_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-robux-not-a-scam_GM431946152.pdf
    • http://elearning.mtsn
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000039e3.bin
7dbc20758a22b09e6062a2d395de59cfd6ab35dca4a450b1e5993c405f63bc56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x39E3 23232 bytes
font_01_sfnt_off00006e46.bin
c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E46 2896 bytes
font_02_sfnt_off0000782b.bin
55716a7eef5342f175226249442460552699f57233d89bd721837c942058d113		 pdf-font-stream PDF embedded font (sfnt) at offset 0x782B 18924 bytes

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