Malicious PDF — malware analysis report

Static analysis result for SHA-256 13a8567bc4f52e62…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 12:39:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 682b7794f17de7b03367472f86072252 SHA-1: ac9e35629a5d7bbd0577aeacdb43c16b83c662a1 SHA-256: 13a8567bc4f52e62b7f5d1b2a7558c1b6098e8237d2c99b46ffceb156a050f47
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are related to game hacks and cheats, indicating a lure for potentially malicious downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic further supports a malicious intent. The document's structure suggests it is part of a link farm designed to drive traffic to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/479516143/how-to-download-minecraft-java-edition-for-free-game-hack
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/abd-roblox_GM431946152.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-hack-2021-ios_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021-haktuts_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-to-find-coin-master-free-spin-link_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-coins-and-spins-in-coin-master_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-coin-master-hack-no-verification_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/minecraft-iphone-free_GM479516143.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-coin-master-spins-daily_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/hack-free-spin-coin-master_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-spins-coin-master-unlimited_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/150-free-spins-coin-master_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/bux-gg-robux-free_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-spins-coin-master-daily_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/coinmaster-spin-ml_GM406889139.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/how-do-u-hack-roblox_GM431946152.pdf
    • https://elearning.min13bm.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdf
    • http://elearning.min13bm.sch.id/__statics/gudangsoal/files/coin-master-online-free-spin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d03.bin
ca1a2a451f4930cfac9a6d48a53d09af4c8936f6bf66570691619c62d2f143f9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D03 25204 bytes
font_01_sfnt_off000085d8.bin
372950b09ae56ccdc45362242de33d197b063ee091c9df90a0e91acdbb6b8628		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85D8 18572 bytes

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