Malicious PDF — malware analysis report

Static analysis result for SHA-256 86fbdf98e92a2ca4…

MALICIOUS

PDF

61.3 KB Created: 2020-04-24 22:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-09
MD5: 9f9d28a0d1b5f69065917ccc02973a20 SHA-1: b0bb2e3e2c517c486cbfb0bd620077db1a9083dd SHA-256: 86fbdf98e92a2ca4969d5401b02b4f63080609339f405e3c4320141ac9538a84
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are numerically or generically named, suggesting a link farm or SEO poisoning attempt. The document body, though heavily obfuscated, contains a URL that points to an HTML file, indicating a potential redirection or further payload delivery. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9882

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://supercontinent-bp.com/uploads/1/3/0/4/130435588/130435588.html#historia+del+basquetbol+en+chile+pdf PDF link annotation
    • http://agapa.info/uploads/1/3/0/4/130483809/kikajikopirekefoxo.pdfIn PDF document text
    • http://mcguttersunlimited.com/uploads/1/3/0/5/130539238/6484098.pdfIn PDF document text
    • http://bump-baby-beyond.com/uploads/1/3/0/2/130289797/weberudixusolun.pdfIn PDF document text
    • http://dp246.org/uploads/1/3/0/8/130814133/6207498.pdfIn PDF document text
    • http://keystonepetrescue.org/uploads/1/3/1/4/131407163/xekujinulujusozej.pdfIn PDF document text
    • http://eat-sleep-teach.com/uploads/1/3/0/5/130551971/928a556647cb560.pdfIn PDF document text
    • http://andreajohnsony.com/uploads/1/3/0/7/130740489/3902171.pdfIn PDF document text
    • http://www.ParaIn PDF document text
    • http://www.htmlIn PDF document text
    • http://abvalpoIn PDF document text
    • http://www.cl.abc.C.memoriachilenaIn PDF document text
    • http://checo.com/noticia/50-anos-hito-jamas-repetidoIn PDF document text
    • http://www.laterceraIn PDF document text
    • http://hemeroteca.com/basquetbol/chile.biobiochile.htmlIn PDF document text
    • http://www.shtmlIn PDF document text
    • https://www.[26]���In PDF document text
    • http://www.cl/602/w3-article-3564In PDF document text
    • https://tareasdelcolegioIn PDF document text
    • http://www.[8]���In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA6BD 9944 bytes
SHA-256: 94338d73f30a91660cbc1ff7b3668821f3a234030aa01f48a1fef571539844a9
font_01_sfnt_off0000ca63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA63 2652 bytes
SHA-256: e91619dfd4c72a85464d95ef1ba4e67df13020651c42071bafbe521a61d9f7fc
font_02_sfnt_off0000d3c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C9 16036 bytes
SHA-256: 779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63

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