Malicious PDF — malware analysis report

Static analysis result for SHA-256 538a26ca492636f1…

MALICIOUS

PDF

31.9 KB Created: 2020-05-13 17:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 4485f64d0af4ed2646448409e9bb081b SHA-1: 13f0381f952cdfa6cebe3df1c22d4b6a1d7cf742 SHA-256: 538a26ca492636f19ee080cd186e581a5ce88748214ceccf0c0c331b4ef0c4cf
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links to various domains, forming a link farm. The primary URL points to a worksheet, but the heuristic 'PDF_SEO_LINK_FARM' indicates a mass of 18 external PDF links were generated, predominantly hosted on domains like claryzulettephotography.com. This suggests a tactic to manipulate search engine results or redirect users to potentially malicious content, rather than providing legitimate educational material.

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://shenleyshop.net/uploads/1/3/1/4/131411896/131411896.html#determiners+worksheet+with+answers+for+class+9
    • http://claryzulettephotography.com/uploads/1/3/1/3/131383462/wibejuxuv.pdf
    • http://fabiosonslandscaping.com/uploads/1/3/0/7/130776123/f6980749108c7.pdf
    • http://dealswithdessy.com/uploads/1/3/1/4/131438563/9491230.pdf
    • http://blackbusinessexpo1.com/uploads/1/3/1/3/131398440/acf5ff5.pdf
    • http://mrskumkesclass.com/uploads/1/3/0/9/130968958/3533384.pdf
    • http://rspwellness.com/uploads/1/3/1/6/131606290/kapepitivudagevotuwi.pdf
    • http://farming4change.com/uploads/1/3/0/4/130483761/zagotejuxux.pdf
    • http://ateasebusinesssolutions.com/uploads/1/3/1/6/131606807/bekigilosufotimameku.pdf
    • http://valuadd.io/uploads/1/3/1/1/131164117/7547051.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_off00005241.bin
561db296d853993ccb6c8c919edfcb1e0ab371b8070317de2b9d716274070c4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5241 9912 bytes

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