Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8b4711f90d6bc64…

MALICIOUS

PDF

33.1 KB Created: 2020-06-19 18:19:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67f55f24a6e9118a349bfbcbd451910c SHA-1: d8dfa796b150347471e78aa4b1971ee85aa7dc1e SHA-256: a8b4711f90d6bc644fc85fe0c933156ec5fb75a6b7d151f01a8741eaacd552a5
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body also contains text related to 'PDF splitter for large files' and includes several of these external URLs. This suggests a coordinated effort to direct users to a network of sites, likely for SEO manipulation or to host malicious content. No scripts were extracted from this sample.

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://6b.undesirable.us/uploads/1/3/2/6/132695881/132695881.html#pdf+splitter+for+large+files
    • http://hostmaster.junctionworkshop.co.uk/uploads/1/3/0/7/130775939/xobodisulitegag.pdf
    • http://shakespearessister.net/uploads/1/3/1/6/131606343/2771391.pdf
    • http://rein-tech.com/uploads/1/3/0/7/130776015/5a6c55.pdf
    • http://nimehime.com/uploads/1/3/1/4/131406650/dazid-boluwapas.pdf
    • http://letsparti.org/uploads/1/3/1/4/131437341/neliwip-fizipotumub.pdf
    • http://highnotesstudios.com/uploads/1/3/1/3/131398544/jeledikuwa.pdf
    • http://ariseandshinephotos.com/uploads/1/3/0/6/130621511/funetatatizixo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000460b.bin
0f9e7d69a9c8a2e0886bb74a1a217d042be2848d98602365779629adf7e12370		 pdf-font-stream PDF embedded font (sfnt) at offset 0x460B 4892 bytes
font_01_sfnt_off000056bd.bin
aa0c339e2959f181920010a99269cd950a3a3dcfff84021eb269ada0e564ca3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56BD 9872 bytes

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