Malicious PDF — malware analysis report

Static analysis result for SHA-256 8043a6432bc684eb…

MALICIOUS

PDF

36.6 KB Created: 2020-03-20 06:04:44 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: ae65efc6e13c0db7c8f5a1e1c6c9ff07 SHA-1: 979c1d3ccb3128fce1dcce4cf030ac5761cb3e13 SHA-256: 8043a6432bc684eb6b3f258ef9666bf19024d4d43ff82202a81738e3b15d3ae3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a link farm. While no scripts were explicitly extracted, the nature of the embedded links suggests an attempt to direct users to potentially harmful content hosted on external domains.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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 http://bigdsuperfoods.com/uploads/1/3/0/8/130874317/130874317.html#cuales+son+las+acepciones+de+la+palabra+derecho PDF link annotation
    • http://summercourt.biz/uploads/1/3/0/6/130621164/2375631.pdfIn PDF document text
    • http://ndcca2016.com/uploads/1/3/0/4/130435842/tozivixosemo.pdfIn PDF document text
    • http://endlessarttattoostudio.com/uploads/1/3/0/6/130621648/78ec5c5e080e.pdfIn PDF document text
    • http://ngreenco2.com/uploads/1/3/0/7/130739037/dudexan_pasexomawijasi.pdfIn PDF document text
    • http://ishsh.org/uploads/1/3/0/5/130551226/fomin.pdfIn PDF document text
    • http://m28baze.com/uploads/1/3/0/3/130379391/4769669.pdfIn PDF document text
    • http://lorenkeithjordan.com/uploads/1/3/0/5/130550890/jonimifusarekiruwa.pdfIn PDF document text
    • http://sunsetmedicalcare.net/uploads/1/3/0/2/130270931/nivajigolel_xalibesaju.pdfIn PDF document text
    • http://merveillessucrees.com/uploads/1/3/0/6/130620185/9791f62a689b2.pdfIn PDF document text
    • http://www.otcusedautoparts.com/uploads/1/3/0/4/130488123/juvuwafifulezob.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6636 8464 bytes
SHA-256: 70e96ef91d6777088b8c7fe2062a8b5497e28baa64e13b18177e67c44766fb07

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