Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87bc3b7c8e0aaca…

MALICIOUS

PDF

33.6 KB Created: 2020-04-10 02:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4f9b0dbe9018f932f4c1c805b2bf2f4f SHA-1: f813cd7ef723a7fdd9e9aede4f50ba004bc963de SHA-256: d87bc3b7c8e0aaca4614cb5c2821dfedcd97fa716527ede2f5d65a1f1fe4ede4
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. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body contains a cryptic phrase and metadata indicating it was generated by wkhtmltopdf, but no direct malicious script execution is evident within the PDF itself. The primary attack vector appears to be directing users to external, potentially malicious, content.

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://lconnex.com/uploads/1/3/1/3/131380951/131380951.html#qual+donna+attende+a+gloriosa+fama
    • http://takashimura.org/uploads/1/3/0/2/130274199/e8c88f19201708.pdf
    • http://belperfireworks.com/uploads/1/3/0/3/130324236/4055836.pdf
    • http://lightninghat.com/uploads/1/3/0/7/130739121/vetiwabubafod_fomoraxisewax_rudojoxadew_gedetuguwugixe.pdf
    • http://crawlspacerepairva.com/uploads/1/3/1/4/131437318/7f4b90e10dea.pdf
    • http://insuranceschool.com/uploads/1/3/0/2/130271205/kasazepipuze.pdf
    • http://copenhagen-bikes.com/uploads/1/3/0/4/130436399/kujiji-luzemaneb-dibokugoze-bodesimepapize.pdf
    • http://120bennettfoley.com/uploads/1/3/1/3/131382790/fifalesivol_juveteviv_kuzopemudaj_xosudozipalo.pdf
    • http://destined2b.net/uploads/1/3/0/6/130605393/babd3196ed.pdf
    • http://pittsburghpaddleboard.com/uploads/1/3/1/1/131163751/4530357.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_off000059f6.bin
f7ad5ad7c9f9494bb786cfa21223f884051f6c5e25921fb4e161e1a872fe9395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59F6 8120 bytes

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