Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c4dd778042d3df3…

MALICIOUS

PDF

38.0 KB Created: 2020-03-15 10:07:10 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 5b6154bcd76557bec77d0a27c8d9ba91 SHA-1: 6ce8b93fd7cba2b7ac053fa2b76a22a44db21d3c SHA-256: 0c4dd778042d3df3268b8ddc770614d518d3f757f68125babba356454b6c11fd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text related to 'combining like terms worksheet 6th grade pdf' and references the wkhtmltopdf tool, suggesting a lure document. The primary function appears to be directing users to a network of external websites, likely for SEO spam or to host further malicious content.

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://adsl-63-204-18-48.benefitplans.org/uploads/1/3/0/7/130776164/130776164.html#combining+like+terms+worksheet+6th+grade+pdf PDF link annotation
    • http://photolenka.com/uploads/1/3/0/6/130639336/kibadepesiro_kujatavax_dageguf.pdfIn PDF document text
    • http://cf-protected-www.doorandwindowplus.com/uploads/1/3/0/8/130874207/xizus-tuzuraroxiweza-mowiruw.pdfIn PDF document text
    • http://memberships.jacwellness.com/uploads/1/3/0/2/130287893/mugaxoga.pdfIn PDF document text
    • http://lorenhicks.com/uploads/1/3/0/8/130874077/wiperogizenubu_gusolevadama.pdfIn PDF document text
    • http://www.ahigherplanegi.store/uploads/1/3/0/9/130969865/6850e79469107f.pdfIn PDF document text
    • http://blackmarketbotanicals.com/uploads/1/3/0/5/130588437/ruvite_gigelenawidadu_pidipejaw.pdfIn PDF document text
    • http://www.raphael-desenvolvimentopessoal.com/uploads/1/3/0/7/130775196/zosixiva_xogawexusevub_lodisus_modotu.pdfIn PDF document text
    • http://parkroyalmhc.com/uploads/1/3/0/5/130540106/2579501.pdfIn PDF document text
    • http://grisbucarest.com/uploads/1/3/0/4/130490036/fekijo.pdfIn PDF document text
    • http://hostmaster.gratefulfredsukeleardeterrent.co.uk/uploads/1/3/0/2/130274097/5373196.pdfIn PDF document text
    • http://leongiles.net/uploads/1/3/0/6/130605179/logekuzo.pdfIn PDF document text
    • http://www.thesicilianscotchman.com/uploads/1/3/0/4/130483766/bilaxurugoniz-wototizor-semesoterilamuk.pdfIn PDF document text
    • http://theatlantadoula.com/uploads/1/3/0/5/130588649/0a91b4011315.pdfIn PDF document text
    • http://akcab.com/uploads/1/3/0/7/130739519/salikuk_fedefopurupamov_furobug_ligisazukevisu.pdfIn PDF document text
    • http://chipperhairbeauty.com/uploads/1/3/0/2/130272994/356684.pdfIn 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

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_off00005f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F78 8132 bytes
SHA-256: 5bd47291076d8282b1c1b057c302569d67d334b93be72e7f477f4b3fad8d1b8b
font_01_sfnt_off00007f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F07 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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