Malicious PDF — malware analysis report

Static analysis result for SHA-256 bce0dc4fff028560…

MALICIOUS

PDF

35.2 KB Created: 2020-04-18 16:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9e9c0a7e993aacadb4169a5cc1e9beb3 SHA-1: a5296d5b73eced8ae8b023b014e0590a080d1bfe SHA-256: bce0dc4fff02856053f319118e71e949cd4145a9d9229d5dbdb4066b1f60ac83
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, indicating a link farm or distribution network. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior, suggesting the document's primary purpose is to redirect users to other potentially malicious or SEO-manipulated content. The ML classifier also strongly indicated maliciousness.

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://trainingbulls.com/uploads/1/3/0/6/130621634/130621634.html#bunk+bed+fitted+sheets+uk
    • http://newproductinstitute.info/uploads/1/3/1/4/131483069/4201528.pdf
    • http://onkoyoga.com/uploads/1/3/1/4/131438128/zudev-duwub-sozojegol.pdf
    • http://crossingbridgeslifecoaching.com/uploads/1/3/1/1/131163533/jazopexuxatosu_fufajodagasaf_kidamekop.pdf
    • http://marinalucille.com/uploads/1/3/0/9/130969431/9269285.pdf
    • http://lanciar.shop/uploads/1/3/0/4/130489367/1324597.pdf
    • http://medrano-homes-construction.com/uploads/1/3/1/1/131164176/9910103.pdf
    • http://kitchenearth.net/uploads/1/3/1/4/131453316/198ca5a364b7b.pdf
    • http://rentzjewelry.com/uploads/1/3/0/4/130483844/rifijosigukaxi_nunojekupesi.pdf
    • http://ivoryeventplanner.com/uploads/1/3/1/6/131606339/bewefirovawuf_nanisoxewopadoj.pdf
    • http://phenomenalprotectivesecurityservices.com/uploads/1/3/0/7/130738814/wijafipafowajifavig.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_off000061f7.bin
dee0790a38d0345d5bbb5a5374378cc71d5902392e33194d9c14a666dd3532f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F7 8028 bytes

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