Malicious PDF — malware analysis report

Static analysis result for SHA-256 530a6b25882aacc1…

MALICIOUS

PDF

33.7 KB Created: 2020-06-16 12:20:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 97dbbd9e81e9e2bc58bd76352b39af8f SHA-1: 67316b64ec7ff5542368ecb3905951719fb2d133 SHA-256: 530a6b25882aacc11d9953d43c8d332dc22be63a800d2e15f997218f50800724
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. The document body text, though partially corrupted, includes a phrase related to 'diet and exercise fail hormones' and the wkhtmltopdf tool, suggesting a lure. The primary attack pattern involves redirecting users to a link farm of potentially malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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://tianaskitchen.com/uploads/1/3/1/4/131453453/131453453.html#when+diet+and+exercise+fail+hormones
    • http://hostmaster.celticcollective.com/uploads/1/3/0/6/130620731/5608727.pdf
    • http://nationalcomediansguild.com/uploads/1/3/0/7/130739595/waxuliretij.pdf
    • http://telestaff.humblepolice.com/uploads/1/3/1/1/131163909/3430639.pdf
    • http://romhs.com/uploads/1/3/1/3/131381712/22fdb9e9.pdf
    • http://mybbbooks.com/uploads/1/3/1/0/131071038/8860370.pdf
    • http://webmail.jannel.co.uk/uploads/1/3/1/4/131453354/wexezejukixak_tubiwefurus.pdf
    • http://i-405corporatecenter.com/uploads/1/3/0/7/130775567/regowod.pdf
    • http://implantclients.com/uploads/1/3/0/9/130969441/7241da3.pdf
    • http://wellnessreclamation.com/uploads/1/3/1/8/131871614/vawabagaxamaje.pdf
    • http://hostmaster.coweselectrical.com/uploads/1/3/1/4/131408913/4916222.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_off00005996.bin
ed9bf4a9aa898e6c6022471a9b3e07a7e78a2420f9d13c6581cd7d0385c021d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5996 10044 bytes

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