Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb01fc1fcf8b15d0…

MALICIOUS

PDF

63.9 KB Created: 2020-11-11 10:01:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b810b139fcc6f7ee8deb51632606cbfe SHA-1: ae72db8b5aca1cc50c4a344c3491b32803f46197 SHA-256: cb01fc1fcf8b15d0d8251083acc6b845865e7cb5a143c377af74560b6cc1a917
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/strik?keyword=to+kill+a+mockingbird+chapter+18-21 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f9250ad0cd6d.pdfIn PDF document text
    • https://dajapofijakaf.weebly.com/uploads/1/3/4/2/134266914/4b3ede11404.pdfIn PDF document text
    • https://bufasadapigeze.weebly.com/uploads/1/3/4/3/134307931/xemajegore.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/bisutid-mobosad.pdfIn PDF document text
    • https://tovozilulu.weebly.com/uploads/1/3/0/8/130873983/6a6e67245.pdfIn PDF document text
    • https://vikumeniwexawud.weebly.com/uploads/1/3/0/9/130969440/ruditizitekuzotif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380403/normal_5f967e3cdb273.pdfIn PDF document text
    • https://numilobes.weebly.com/uploads/1/3/4/2/134235742/c5bb9d6.pdfIn PDF document text
    • https://xekexudaxojow.weebly.com/uploads/1/3/4/3/134365032/wevuni-sebogar-kafizo-telab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384644/normal_5f94844addd76.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/tibor.pdfIn PDF document text
    • https://zakekeru.weebly.com/uploads/1/3/4/5/134584110/7014608.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/710a86c2-4d53-4403-8611-aa6c3cebf69e/19513349940.pdfIn PDF document text
    • https://s3.amazonaws.com/fezenur/spatial_analysis.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_off0000be7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7A 5872 bytes
SHA-256: b98d8564172860736824c9cdab01ca646cfeb636aacab7c933f888358f078a42
font_01_sfnt_off0000d248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD248 9532 bytes
SHA-256: ab07e1e738601b8f0ea84d7d70382a61aec8755897451ea47fcbf9e7eec9b391