Malicious PDF — malware analysis report

Static analysis result for SHA-256 c23a617ce3651f2c…

MALICIOUS

PDF

40.8 KB Created: 2020-10-07 00:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 5abcdd882737db734e07b773442c83bc SHA-1: ef4c4fc6e2a52f52e69e02f8723355721e9b8289 SHA-256: c23a617ce3651f2c8338ddbae228a2c4d675214efa4bf8cbbe54b1bba873f4f5
184 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.
  • 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://gettraff.ru/strik?keyword=you+caroline+kepnes+quotes In PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/62957189623.pdfIn PDF document text
    • https://site-1038421.mozfiles.com/files/1038421/68727286212.pdfIn PDF document text
    • https://site-1038868.mozfiles.com/files/1038868/zoriw.pdfIn PDF document text
    • https://site-1037266.mozfiles.com/files/1037266/xikazinubovesolixivuwem.pdfIn PDF document text
    • http://sajaful.elfangelscreationslloyd.ca/uploads/1/3/1/3/131380344/68d4ab.pdfIn PDF document text
    • http://silis.bfafairfaxbaseball.org/uploads/1/3/1/3/131379225/vitot.pdfIn PDF document text
    • http://files.whenthingsgowrongmovie.com/uploads/1/3/0/9/130969999/2949404.pdfIn PDF document text
    • http://pokutoju.heartstonegallery.com/uploads/1/3/0/9/130969341/c86e6a56a88d78f.pdfIn PDF document text
    • http://gizosad.bsupds.com/uploads/1/3/1/3/131379655/6342680.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/668ac4b0-ab11-4469-b9f1-30e89cce1ead/melibefufubaxikelifufake.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04770684-09d4-4af4-93bd-3f74236ad1e5/27858200488.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b3a8af4-5dfe-4907-bfc2-9b014aa53300/xeninosolasi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb6e867-bb8d-4401-be96-5e49fc6ccba4/49900113822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3a73e8d-2f00-47df-b255-9dc3eb6628ab/doxenoxekipoviwanopijot.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6124 5080 bytes
SHA-256: 7a8ad9c12abb8c3ed0e2e4e37686dea4da9ad4b8fbf9c1e80b3f1a880a7f9540
font_01_sfnt_off00007280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7280 10752 bytes
SHA-256: 4c08d13f97b299303db1a5055d42caeb82e4586c2f03f69bbcf712ea7ee7ec39

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