Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d89d7cbe8772720…

MALICIOUS

PDF

18.2 KB Created: 2020-03-13 11:51:28 +00:00 Authoring application: mPDF 5.7
MD5: 0d38b6471d6dc4c20b772c277ecbdf76 SHA-1: 4d08e049fbe06841e77855d347144cd743916c2e SHA-256: 6d89d7cbe8772720ce4a144e88efe56760bd3718e44b07535f6c12b353ab85b1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute further malicious content. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the embedded links themselves serve as the primary attack vector, likely leading to further stages of infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

Heuristics 2

  • 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.
  • 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://rtuninnsi.myhome.cx/96a56a76a86a16a1/Zeit-der-Vergebung-by-Kathryn-Cushman.pdf
    • http://rtuninnsi.myhome.cx/86a86a06a36a4/Amish-Friendship-Bread-Amish-Grace-An-Amish-of-Lancaster-County-Saga-by-Ruth-Price.pdf
    • http://rtuninnsi.myhome.cx/76a46a66a56a46a2/Fairfield-Amish-Romance-Amish-Christmas-Boxed-Set-by-Susan-Vail.pdf
    • http://rtuninnsi.myhome.cx/96a56a66a76a36a9/Amish-Brotherly-Love-Corbins-Creek-Amish-Romance-Series-by-Martha-Sowell.pdf
    • http://rtuninnsi.myhome.cx/26a36a36a86a76a7/An-Amish-Match-Amish-Hearts-2-by-Jo-Ann-Brown.pdf
    • http://rtuninnsi.myhome.cx/16a36a46a66a7/Rodzina-by-Karen-Cushman.pdf
    • http://rtuninnsi.myhome.cx/26a36a96a96a26a3/We-Help-Mommy-by-Jean-Cushman.pdf
    • http://rtuninnsi.myhome.cx/16a86a86a76a06a7/Amish-Courtship-Volume-Three-An-Amish-Courtship-3-by-Samantha-Bayarr.pdf
    • http://rtuninnsi.myhome.cx/26a76a56a56a9/Mystery-at-the-Club-Sandwich-by-Doug-Cushman.pdf
    • http://rtuninnsi.myhome.cx/16a36a36a46a96a7/Alchemy-and-Meggy-Swann-by-Karen-Cushman.pdf
    • http://rtuninnsi.myhome.cx/46a56a76a86a26a5/The-Loud-Silence-of-Francine-Green-by-Karen-Cushman.pdf
    • http://rtuninnsi.myhome.cx/16a86a86a66a96a5/Amish-Harvest-1-Amish-Harvest-1-by-Samantha-Bayarr.pdf
    • http://rtuninnsi.myhome.cx/56a06a86a26a46a8/Guano-and-the-Opening-of-the-Pacific-World-A-Global-Ecological-History-by-Gregory-T-Cushman.pdf
    • http://rtuninnsi.myhome.cx/56a06a36a76a86a0/Fires-in-the-Bathroom-Advice-for-Teachers-from-High-School-Students-by-Kathleen-Cushman.pdf
    • http://rtuninnsi.myhome.cx/76a76a06a16a56a2/These-Are-the-Voyages---TOS-Season-Three-These-Are-the-Voyages-3-by-Marc-Cushman.pdf
    • http://rtuninnsi.myhome.cx/26a96a36a16a46a2/Saving-the-Bacon-Kathryn-Lamb-by-Kathryn-Lamb.pdf
    • http://rtuninnsi.myhome.cx/36a56a86a46a26a9/The-Half-Stitched-Amish-Quilting-Club-The-Half-Stitched-Amish-Quilting-Club-1-by-Wanda-E-Brunstetter.pdf
    • http://rtuninnsi.myhome.cx/36a26a36a26a46a3/An-Amish-Christmas-Gift-by-Amy-Clipston.pdf
    • http://rtuninnsi.myhome.cx/56a06a26a36a96a2/An-Amish-Christmas-by-Cynthia-Keller.pdf
    • http://rtuninnsi.myhome.cx/36a26a26a76a96a8/Between-Two-Worlds-Amish-1-by-Shelter-Somerset.pdf

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