Malicious PDF — malware analysis report

Static analysis result for SHA-256 3426a45b1f83a9c2…

MALICIOUS

PDF

42.9 KB Created: 2021-05-15 12:13:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 909072030450db14497537fc57d79d46 SHA-1: d4fb6627bf87115135b620fd6d70ae5a4f8547f1 SHA-256: 3426a45b1f83a9c2e795ddc1e78eca37a874b0c5828823ac8d560042cc6d76e9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous external links, many of which are SEO-optimized and point to potentially malicious content or scams. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links within a small PDF, suggesting an attempt to generate traffic or distribute harmful content. The presence of a download button lure further supports a malicious intent to trick users into clicking these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-spins-2021-apk-game-hack
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-coins-for-free_GM479516143.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/minecraft-pe-server-hosting-free_GM479516143.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/minecraft-free-school_GM479516143.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-robux-link_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master-link_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-robux-games_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/coin-master-gold-cards-hack-english_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-coin-master-generator_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master-link-2021_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/coin-master-online-hack-download_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/claim-robux_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/free-links-for-coin-master_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/mcpe-master-unlimited-coins-free-download_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-game-ios_GM406889139.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/roblox-free-robux-generator_GM431946152.pdf
    • https://elearning.mtsn2hsu.sch.id/__statics/gudangsoal/files/mcpe-com_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c93.bin
cb6bd62f4fbef035cca326ceca9554aac4cb005838b8002242ccb599ce130a8f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C93 24728 bytes
font_01_sfnt_off000084df.bin
36172b8199ed8392a16c1209cf3a913f384f74be331676b8a446cb929dbf73c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DF 18456 bytes

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