Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e84436fcccd374e…

MALICIOUS

PDF

38.8 KB Created: 2020-04-14 09:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 993013359b2d650b7111b9f8f5e79e37 SHA-1: 5744014e5b84ecee2e126b8bce6f4f93e2cf56f4 SHA-256: 8e84436fcccd374efc27fcf15cf4ad568162f8842abd7dfe09eac0edf561dda4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' specifically indicates a large number of external links within a small PDF, suggesting a coordinated effort to generate traffic or distribute further payloads. The ML classifier also strongly indicates maliciousness. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://onlinetechedresearch.com/uploads/1/3/1/3/131380320/131380320.html#gastroenterology+reports+journal+impact+factor
    • http://orangegrovegiftco.com/uploads/1/3/0/7/130776060/6696904.pdf
    • http://boblatta.com/uploads/1/3/0/7/130776250/545d67749.pdf
    • http://definefab.com/uploads/1/3/0/5/130588505/patilonodapifaf_fawopedalonanik_zulaj.pdf
    • http://uxpuli.com/uploads/1/3/0/2/130272092/bf3cf.pdf
    • http://ebe-thebook.com/uploads/1/3/0/4/130483429/5111127.pdf
    • http://jmcconchie.com/uploads/1/3/0/2/130291453/0f71299e.pdf
    • http://torontoburnjays.com/uploads/1/3/0/8/130813991/2520f7a329.pdf
    • http://regainedrelics.com/uploads/1/3/0/5/130539120/golami.pdf
    • http://gendernaturalism.com/uploads/1/3/0/5/130588337/sajimozudaxemem.pdf
    • http://garagedawgtraining.com/uploads/1/3/1/4/131437753/legare.pdf
    • http://risinghopefoundation.net/uploads/1/3/0/6/130639899/relofobajefiwox.pdf
    • http://vaganture.com/uploads/1/3/1/3/131381088/zikor_milukivegi_kuwabef_jeked.pdf
    • http://happeningat50.com/uploads/1/3/0/6/130604054/1579b92f750a.pdf
    • http://leaderschool.be/uploads/1/3/1/4/131453018/sodezewezilonisite.pdf
    • http://ebe-thebook.com/uploads/1/3/0/4/13
    • 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_off00007066.bin
6f56054cac6dd2e3a7be29eed71ecbdfb549f06e5fca27deff611cf3b10486eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 7776 bytes

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