Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b5c53806e4f9a6…

MALICIOUS

PDF

37.1 KB Created: 2020-11-08 22:15:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 5a7bae28fab153015327a13adadcb406 SHA-1: 8132516cdce9f5a3b0452a87f88fffd7d7397b61 SHA-256: 65b5c53806e4f9a62284fc0f25eaf47f24406cf767a546d46be35fecbfdb59eb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/aws?keyword=four+play+maya+banks+read+online In PDF document text
    • https://cdn-cms.f-static.net/uploads/4457572/normal_5fa0ab7d460e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5fa1d5f1b2e79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456660/normal_5fa5489f52889.pdfIn PDF document text
    • https://kibutabez.weebly.com/uploads/1/3/4/4/134438896/zutuf-tovotowafox-xixop-vawilesefupejaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5fa52a1776313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f883c074fb6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f920190ace0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424361/normal_5f9c7b30e28ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://pugomuzin.files.wordpress.com/2020/11/wawowixi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b08287b1-4de4-42e7-b92d-7f3308b9b0fe/19350620305.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_off000052d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52D2 5368 bytes
SHA-256: 7e1272b8966069b2f89e3b304e8f0dd4f4f768384d8da62b351b5f007e9717e4
font_01_sfnt_off000064fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FE 10256 bytes
SHA-256: fbf896c75900efbc4840d61f77faef4b12bff7d37033d2bc8075168d23af2b81