Malicious PDF — malware analysis report

Static analysis result for SHA-256 191fa91cddec7e74…

MALICIOUS

PDF

74.3 KB Created: 2020-04-23 06:37:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-06-22
MD5: b86a6204bf546c52e1f7d0c731cff76d SHA-1: 9e4170e6590fb95a71c7575780c42e2150fa301b SHA-256: 191fa91cddec7e74b94426e42a476d0e4102bc7f80e4342e44c3cf83553438d2
116 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://darcyk.com/uploads/1/3/1/3/131379183/131379183.html#easy+piano+christmas+songs+free+sheet+music PDF link annotation
    • http://neuropsicopedagoga.net/uploads/1/3/0/8/130813982/123f5967da97.pdfIn PDF document text
    • http://cyndyandrus.com/uploads/1/3/0/8/130874490/bixaxozagizin.pdfIn PDF document text
    • http://winkylewis.com/uploads/1/3/0/8/130874641/5305717.pdfIn PDF document text
    • http://cws-inc.com/uploads/1/3/0/5/130538956/bexubo-silovi.pdfIn PDF document text
    • http://mistymeadowsfarm.net/uploads/1/3/1/4/131453465/fd4ec0db.pdfIn PDF document text
    • http://madisonchristmaslights.com/uploads/1/3/0/7/130775634/serenakemomuw_redevopipekupo.pdfIn PDF document text
    • http://carolina-premier.org/uploads/1/3/0/9/130969353/6c50307ccab.pdfIn PDF document text
    • http://mint-uk.com/uploads/1/3/0/5/130590029/cedafa7f05.pdfIn PDF document text
    • http://blissbrothersbikes.com/uploads/1/3/0/5/130551386/9064594.pdfIn PDF document text
    • http://powerfulwomenofgod.org/uploads/1/3/0/4/130477152/34b4bc0ac1f9db.pdfIn PDF document text
    • http://permitprosnw.com/uploads/1/3/0/2/130287548/memiwufep.pdfIn PDF document text
    • http://texanbeef.com/uploads/1/3/0/2/130272524/2082820.pdfIn PDF document text
    • http://radiofreechristianity.com/uploads/1/3/1/3/131380094/nerebuxudakifixutu.pdfIn PDF document text
    • http://laryngectomee.info/uploads/1/3/1/4/131407117/2540113.pdfIn PDF document text
    • http://uniquehomesofwashington.com/uploads/1/3/0/7/130775470/6284824.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

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