Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d1866e6f51e13c…

MALICIOUS

PDF

47.0 KB Created: 2021-05-14 17:38:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2177c2af8f03e3e632dabff33ec5f64e SHA-1: 97392fee3e35b097e2648778236f42edb6d36ba1 SHA-256: 25d1866e6f51e13c3426211af877620c7067fb57cbbac54f9f9900ac8f4d0806
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which are structured as SEO-friendly URLs pointing to game-related content like 'free roblox accounts' and 'coin master spins'. This suggests a phishing or scam attempt designed to trick users into visiting malicious sites. The presence of a visual download button further supports a lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/rich-free-roblox-accounts-game-hack
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-spin-generator-for-coin-master_GM406889139.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-spin-link-coin-master-today_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/master-8-ball-pool-free-coins_GM406889139.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hack-game-coin-master_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-online-free-no-download_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/daily-coin-master-spins_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/is-minecraft-realms-free_GM479516143.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-robux-generator-no-verification_GM431946152.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-2021-free-spins-link-2021_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-spin-link-free-download_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/best-roblox-hacks_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/links-for-coin-master-free-spins_GM406889139.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-hack-download_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/show-me-how-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/try-minecraft-free_GM479516143.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hack-coin-master-app-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004ae1.bin
69a2ed4a5df235fe95671f579eee418696bf3983d52a72b81a00343f57b860d6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE1 27500 bytes
font_01_sfnt_off00008b52.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B52 2840 bytes
font_02_sfnt_off00009504.bin
69e1d5e5a83ed6ac699c80c427ab379f6df08c8c6cfae5eea415a35bb5866042		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9504 18476 bytes

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