Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed587e8da97d1a53…

MALICIOUS

PDF

37.3 KB Created: 2020-05-27 11:22:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a3860ba3b17fd7c6c17d9d80248ea666 SHA-1: 58e96d5385bdfc5a53e8bc67a2290d09e43a4ada SHA-256: ed587e8da97d1a53b4dd5656977a85ecd7701ea89391a85c5ce5b20c03694bab
92 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The ML classifier also flagged this PDF as malicious. The document body contains text related to 'ejercicios wh questions pdf' and includes several URLs that appear to be part of a link farm designed to manipulate search engine results or distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://goodbabyformula.com/uploads/1/3/1/4/131438532/131438532.html#ejercicios+wh+questions+pdf
    • http://performanceequinetherapy.org/uploads/1/3/0/3/130324234/jiwowagowat-taleso-fowokololatif-nolupuw.pdf
    • http://gwhiz.com/uploads/1/3/0/4/130483299/7082504.pdf
    • http://adventuretimehobbies.com/uploads/1/3/0/6/130604699/mamanarase.pdf
    • http://ecoarchidesign.com/uploads/1/3/0/7/130739072/c542baa2d11d.pdf
    • http://hostmaster.cmprecruitmentspecialist.com.au/uploads/1/3/1/3/131398135/7664765.pdf
    • http://tedharrislamps.com/uploads/1/3/0/6/130639542/7903416.pdf
    • http://councilofschoolassociations.com/uploads/1/3/1/6/131637223/xuvuxavevej.pdf
    • http://mx.nlwatercolor.com/uploads/1/3/0/5/130541677/5558916.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_off000061c9.bin
c555461d17a0d633c4ec197b54df96b5d7b374afd5a2e3b1331a992e1bf0bd6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 12276 bytes

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