Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d26ff460bd89ec…

MALICIOUS

PDF

44.8 KB Created: 2020-11-08 10:10:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: a759a2e9ce26b348183c5eef075c9796 SHA-1: b18be98875c2684c3f3309dcd9be2a3fee355729 SHA-256: 70d26ff460bd89ecfdccf1989dd27b7c8012a5bdc7a72a49bad6905cdcb2710a
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=security+architecture+role PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367281/normal_5f9d1930d3e4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403946/normal_5fa19bb7b1143.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_5f8860023c273.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/4376832.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5f9b91670bf48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_5fa6be80ec535.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_5fa74f879d29f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f9b7af03ac85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367923/normal_5f8c01c882a31.pdfIn PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/7228805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408195/normal_5f9a67a854964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390371/normal_5f9468cbd36b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367937/normal_5f91f7b201c2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f91ee7f5c67e.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/662a7727-a18e-4adc-91e9-aad7316f52d2/earth_rotation_and_revolution_worksheet.pdfIn PDF document text
    • https://mazabewuv.files.wordpress.com/2020/11/77978157398.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_off0000725d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725D 4916 bytes
SHA-256: 4cd5f58142090a7bacf865bbaee792f946da8caa63a9775790a6412be1484ece
font_01_sfnt_off0000831a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831A 10364 bytes
SHA-256: 7f8e56c18f82c0199c56ddb0d6bfb78ebec5e24d0d02636441c5d3549749d01c