Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3c4def9dbee32b9…

MALICIOUS

PDF

40.0 KB Created: 2020-03-28 06:13:18 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 333204b09a916d2e7d605fbbc8ec76b2 SHA-1: 61968d47004170e30b08e60d13b021cf7de1a861 SHA-256: d3c4def9dbee32b96a19c7d3d96bac5cc83c34e380bc56651ed8ad3238a58681
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, many of which are numerically or generically named, indicative of a link farm or SEO spam campaign. The document body, though partially corrupted, contains text related to medical diagnostics, likely a lure to disguise the malicious intent. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a link farm attack pattern.

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://helpking.org/uploads/1/3/0/3/130323822/130323822.html#diagnostico+diferencial+entre+artritis+reumatoide+y+osteoartritis PDF link annotation
    • http://cyi-usa.org/uploads/1/3/0/5/130539820/801acbc097fdcd.pdfIn PDF document text
    • http://mx20.carmichaelnl.com/uploads/1/3/0/2/130288639/9992731.pdfIn PDF document text
    • http://wellwellcreative.com/uploads/1/3/0/4/130488163/kapizo.pdfIn PDF document text
    • http://tastingfair.ca/uploads/1/3/0/5/130551324/62b41d95dc2752e.pdfIn PDF document text
    • http://www.etechnology.shop/uploads/1/3/0/3/130379294/707cfc30.pdfIn PDF document text
    • http://voreckapp.com/uploads/1/3/0/4/130493037/wudetexiwivikamoxu.pdfIn PDF document text
    • http://www.leubner-wedding-1.brickyardphoto.com/uploads/1/3/0/7/130776801/6246227.pdfIn PDF document text
    • http://romangast.de/uploads/1/3/0/6/130621784/6113135.pdfIn PDF document text
    • http://versafashion.com/uploads/1/3/0/2/130289279/kepelafizivoxabefe.pdfIn PDF document text
    • http://mr-organics.eu/uploads/1/3/0/3/130379365/9aac76822.pdfIn PDF document text
    • http://mariettasquarefarmersmarket.net/uploads/1/3/0/3/130324350/fipasot.pdfIn PDF document text
    • http://loner420house.ca/uploads/1/3/0/3/130379673/b3776b131024ad1.pdfIn PDF document text
    • http://webmail.ressource-therapie.com/uploads/1/3/0/3/130323213/bc78be8f7.pdfIn PDF document text
    • http://www.ministryofmixology.com/uploads/1/3/0/4/130483290/3a2966c.pdfIn PDF document text
    • http://accordingtoiris.com/uploads/1/3/0/5/130550672/nirekawuwifokopag.pdfIn PDF document text
    • http://avnatarllcafamilycompany.net/uploads/1/3/1/4/131437445/9388438.pdfIn PDF document text
    • http://eluvian.life/uploads/1/3/0/3/130379354/tobed.pdfIn PDF document text
    • http://daphneself.com/uploads/1/3/0/4/130476896/06a85dd9.pdfIn PDF document text
    • http://jrleadgen.com/uploads/1/3/0/6/130621979/voforogupatin-sizos-lagefuf-sejebozorogutum.pdfIn PDF document text
    • http://gypsysouladventures.net/uploads/1/3/0/8/130813571/35eae4.pdfIn PDF document text
    • http://my-healthy-life-cbd.com/uploads/1/3/0/6/130639531/fajazum.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_off00007151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7151 8256 bytes
SHA-256: ae85559b47a21f88d215763247287a687871094b297f38dfac6c26aa20afeeeb

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