Malicious PDF — malware analysis report

Static analysis result for SHA-256 2386ea9368ce5e40…

MALICIOUS

PDF

37.2 KB Created: 2020-06-06 04:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a678ae4565693f72f881624235ebcf7c SHA-1: 18f672610a153a64bb707b7e38784b477235c8b6 SHA-256: 2386ea9368ce5e40e5e329c6ac4bb9cab9a2479ef08117423f15e01ce3132067
92 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 SEO poisoning tactic. The ML classifier also strongly indicated maliciousness. The primary intent appears to be directing users to a large collection of external resources, likely to distribute malware or engage in phishing, rather than delivering content directly within this PDF.

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://westcoastmarinelimited.com/uploads/1/3/0/3/130323724/130323724.html#covenant+tome+1+pdf+ekladata
    • http://mnfserviecs.org/uploads/1/3/1/0/131070367/jedijeli.pdf
    • http://project-journey.org/uploads/1/3/1/4/131453134/kowajexezatime.pdf
    • http://wordvoice.net/uploads/1/3/1/3/131380292/zuwizarikatara_matezijuba.pdf
    • http://davidcurtmorris.com/uploads/1/3/0/7/130776589/vafifawovo.pdf
    • http://famousjewishbirthdaycalendar.com/uploads/1/3/0/6/130640021/1d5dba1fba.pdf
    • http://westcoastmarinelimited.com/uploads/1/3/0/3/130323724/terms.html
    • http://westcoastmarinelimited.com/uploads/1/3/0/3/130323724/dmca.html
    • http://westcoastmarinelimited.com/uploads/1/3/0/3/130323724/policy.html
    • https://bulififo.files.wordpress.com/2020/06/wexubo.pdf
    • https://latafinisuxu.files.wordpress.com/2020/06/47630409908.pdf
    • https://felaweve.files.wordpress.com/2020/06/jivapabufug.pdf
    • https://poxiwibuver.files.wordpress.com/2020/06/zibijedasavajilekodok.pdf
    • https://fatafujuk.files.wordpress.com/2020/06/wosiwutirutozafuvuvo.pdf
    • https://zipojuroxob.files.wordpress.com/2020/06/21410397496.pdf
    • https://sapamuwuj.files.wordpress.com/2020/06/72307206976.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_off00006218.bin
abf9e426a100e7e301286021ab84cba10cfb1628ebd97c9151989a89ee609bc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6218 11960 bytes

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