Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc3f027b9def3426…

MALICIOUS

PDF

33.4 KB Created: 2020-05-31 04:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9f77a4258cdd8afa32e297bdb758ea1 SHA-1: 1e096c09c6bd0814a318f9ed4e543f6488bf4d99 SHA-256: dc3f027b9def3426ce6fccfe470cee1802bff4db9d9c66f0315f7b68eedccd02
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to other PDFs hosted on various domains, indicating a link farm or redirection scheme. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a network of SEO-optimized PDF files, likely to distribute further malicious content or for traffic manipulation. No scripts were extracted, limiting the analysis of direct payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 3

  • 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.
  • 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://fire-fanation.com/uploads/1/3/0/6/130621664/130621664.html#technologie+6%25C3%25A8me+%25C3%25A9nergie+evaluation
    • http://evanstonrealtor.net/uploads/1/3/1/6/131606094/vonuserurowukev.pdf
    • http://hrscomputer.com/uploads/1/3/0/7/130738505/mamorenujo_xugur.pdf
    • http://nuturfsunrise.com/uploads/1/3/1/3/131381802/38ed8d9de9ec6a.pdf
    • http://carolinakelso.com/uploads/1/3/0/8/130874617/kovomelonujakuz.pdf
    • http://sebastianbach.store/uploads/1/3/1/4/131407665/8349829.pdf
    • http://beckinghamteaches.com/uploads/1/3/0/6/130639368/b5f6394efbd78f5.pdf
    • http://shotgunpearl.com/uploads/1/3/0/6/130603744/jexulasezu.pdf
    • http://katherinecaseycowell.com/uploads/1/3/0/6/130604279/varagab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000514f.bin
9ac268fffc6c2f508653ff44842c03bedefcdff514742eb53ac032ffaa70f11c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x514F 13112 bytes

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