Malicious PDF — malware analysis report

Static analysis result for SHA-256 725b813c56ba1dfd…

MALICIOUS

PDF

41.3 KB Created: 2020-11-06 11:01:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 7a5aea0c1a3598e6081268abbbf984ba SHA-1: 69ef04e4b15047c9148184e1c48de2bfc664816a SHA-256: 725b813c56ba1dfd44214c0fd8ecdc65cad1cf7f961145794c0490fba281af3c
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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 https://traffset.ru/123?keyword=philippine+consulate+of+houston+tx PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f8763cfc60d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5f9fc5faa3a0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418791/normal_5fa1e641ab611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5f924b4cd707e.pdfIn PDF document text
    • https://gogekelonirivi.weebly.com/uploads/1/3/4/4/134438841/kugutojafuzigegu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f8f683894c05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f89636413e15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365555/normal_5f95f36f22112.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/8826649.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/rutekonenezosovig.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/6003457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f874c8ad6079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403417/normal_5f9b0a3d1c987.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61e7839-7e39-484b-924b-1a579a9e214a/45952326747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9576c9cb-4d2a-4f61-a54e-8281639aec40/tewodilakofesiluzagebida.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/faruzutidipixejubupomebis.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 5076 bytes
SHA-256: ec187ac4aa3908ed2e110785ba93638e59420b0a17a53fa92cccd46e6d0020af
font_01_sfnt_off0000712a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 11304 bytes
SHA-256: cc0d7de1ff524d808fa2e50793cdb120c1aa8d3abc20955fbf8afea8197f63b4