Malicious PDF — malware analysis report

Static analysis result for SHA-256 db6e107a71afc767…

MALICIOUS

PDF

28.7 KB Created: 2020-04-05 13:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b10a6bf91ae53e74a620dadf65b8b5c1 SHA-1: 33636099edec38c973af3296341a2d469005a2d0 SHA-256: db6e107a71afc767e5576bee6c214ad0eaf5054b406ac243832c22292afe9d63
92 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be generated for SEO purposes. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting users to these external sites, likely to host further malicious content or engage in SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://toalias.com/uploads/1/3/0/3/130323255/130323255.html#lasko+electronic+ceramic+tower+heater+ct16558
    • http://kiefjars.com/uploads/1/3/0/9/130969993/jorim-zomuzidebozo.pdf
    • http://morningrosehouston.com/uploads/1/3/1/3/131379290/zomune.pdf
    • http://arminsuranceplan.com/uploads/1/3/1/4/131454816/surifuxisuruzinag.pdf
    • http://smjdata.org/uploads/1/3/1/4/131453449/33318d70c.pdf
    • http://drvsmusicclasses.com/uploads/1/3/0/4/130476496/7303217.pdf
    • http://brasymmetry.com/uploads/1/3/1/3/131383648/tokevi.pdf
    • http://bellamenteacademy.com/uploads/1/3/0/6/130604140/1565631.pdf
    • http://fitiv50.com/uploads/1/3/0/5/130589133/taxerejilelivubaj.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_off00004a54.bin
d1623ab6554c7a284a309a6f19eed0dd589b74624d0105ac16745b2e0ffe15d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A54 7056 bytes

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