Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eb2730adbddd754…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 11:00:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7521cbaa4088d7e2d8faa9e64e43760a SHA-1: dcacb50374d487c6cb0f3f265f217d0d0d544395 SHA-256: 2eb2730adbddd754b97fa413a53ab9d449c6fc7ddbddb179a15a9658f97247b6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promotes free Robux and game hacks, indicating a phishing or scam attempt. The heuristic firings, particularly PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, strongly suggest malicious intent. While no scripts were directly extracted, the structure and content point towards a social engineering attack designed to lead users to malicious external sites.

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.tw/app/431946152/free-robux-com-roblox-game-hack
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-robux-without-downloading-anything-2021_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/hacks-for-roblox-adopt-me_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-in-one-day_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/comandos-de-free-admin-roblox_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-free-shield-link_GM406889139.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/mcpe-download_GM479516143.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/robloxhacks_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/free-online-minecraft-server_GM479516143.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/spins-gratis-coin-master-hoy_GM406889139.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/tiktok-follower-bot-free_GM835599320.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/robloxcom-create-a-shirt-free_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/best-way-to-get-free-robux_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/op-rewards-robux_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/what-tiktok-free-robux_GM835599320.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/can-pokemon-go-free-download_GM1094591345.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/roblox-phantom-forces-cheats-2021_GM431946152.pdf
    • https://elearning.min1kediri.sch.id/__statics/gudangsoal/files/coin-master-mod-version-free-download-v344_GM406889139.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003563.bin
114bfbc19619b13f061a39354a94331ab451717a21f6361c6d443a20b695e40a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3563 22996 bytes
font_01_sfnt_off000068d1.bin
f1c402a5b139f7054ce39ccfb5800536152a5b826a5c5a7ec81e6f9b67a9d2f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68D1 19052 bytes

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