Malicious PDF — malware analysis report

Static analysis result for SHA-256 a94796de397ac3ea…

MALICIOUS

PDF

53.5 KB Created: 2021-05-13 20:44:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0e122a61cce9a73f373249bff254d628 SHA-1: 538daadbcb574244edb583631dd9763d3fc7efbb SHA-256: a94796de397ac3eaa5098410f2a678938a051df3916455ea131ccf5283e4b740
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded links to external websites, many of which are structured as SEO link farms. These links, such as 'https://netcdn.xyz/app/431946152/free-robux-games-game-hack', are designed to lure users into downloading potentially unwanted or malicious files by promising free in-game items or hacks. The ML classifier also flagged this PDF as malicious with a high score.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9176

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/free-robux-games-game-hack PDF link annotation
    • http://kalaydova.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://kalaydova.com/images/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-download_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://kalaydova.com/images/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D49 35948 bytes
SHA-256: 11a1c83729133bc85da9d5b0c88cf640253616fb1975cd09c471ca93c80c3920
font_01_sfnt_off00009c54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C54 7604 bytes
SHA-256: b4393b16e2c096a269897d1c45a543fc9365713fd2329df9b91235200715c508
font_02_sfnt_off0000aec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEC2 18500 bytes
SHA-256: 50954281d46d1092d2c36c5fba9e04257001c8c7e5b0c8732206987489559ecb

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