Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d27c58c9059cf0b…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 04:59:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f519a97423f4fd6a17aab00b79f8fd48 SHA-1: dffb2fa452f55980975c6a7ed552d39fb20311ac SHA-256: 5d27c58c9059cf0baa761e21091019f986a61f0f29b1987e33ee0a6b2a6f8d70
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/roblox-hack-999.999-robux-2021-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/como-coneguir-robux-gratis-roblox-pc-sin-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-roblox-gear-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/robux-hack-no-human-verification-or-download_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/wild-and-free-serena-ryder-id-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-reward-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-on-pc-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/get-free-robux-on-a-server-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/at-which-game-have-free-robux-at-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-make-a-roblox-dominus-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-html-code-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-hacks-for-2b2t_GM479516143.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2C 22952 bytes
SHA-256: 76c47de8b9b76bfbcf54d838cc3b6f7fee0283e3012b7e142bb2a172a51a5ef0
font_01_sfnt_off000062d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D9 19428 bytes
SHA-256: 3cbc3384bae6e7026849b7154a1bbbd5b06eb1f6ef4e5e61d56d36196eb471a7

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