Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b2de8801b5b9ade…

MALICIOUS

PDF

44.8 KB Created: 2021-05-14 18:03:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4f0ced24f56d9effce2f68ff4a6320a2 SHA-1: 7e40e6338d5d9004ed90d1147aa8fb5a17024ccd SHA-256: 3b2de8801b5b9ade0bf3acde745ad7e9f9828a86e1888cce68d18579bab0378c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, directing users to external sites. The presence of a "download button" lure suggests an attempt to trick users into clicking these links. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/coin-master-levels-game-hack
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-admin-in-roblox_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-hack_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-without-human-verification_GM406889139.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-roblox-accounts-that-work_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-robux-without-any-verification_GM431946152.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-iphone_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/earn-free-robux-today_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-earn-robux-by-playing-games_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/when-was-minecraft-free_GM479516143.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/get-free-cards-coin-master_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/robux-for-kids_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-robux-with-no-human-verification_GM431946152.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-android_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/coin-master-hacks_GM406889139.pdf
    • https://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/free-spins-coin-master-hack-2021_GM406889139.pdf
    • http://elearning.mtsn9jombang.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-with-root_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b2e.bin
3f6795143a9b51474d2479813a328270c4854de50d5346086cf269943cd1df6f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B2E 24632 bytes
font_01_sfnt_off000083fb.bin
fdf27bef7aa9564438d2376e8add5cda7b2e668472cb3d9aeea2043e5db63d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83FB 2960 bytes
font_02_sfnt_off00008e40.bin
ece869c08c97b9ee594c748b621902d10deb759bd9c2ff9e8d3e4156f530a3e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E40 17732 bytes

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