Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b597927e88c8eb6…

MALICIOUS

PDF

42.8 KB Created: 2020-03-07 14:53:19 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2026-05-08
MD5: 7afbc87fa9008bd6974c3763d6230ce3 SHA-1: 9af7ea0b90a50e286f32e13fef0f55d2ebae9e1e SHA-256: 3b597927e88c8eb6812efef252a23020db1770e807f46313f1407375b0997552
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or distribution mechanism. The document body, though partially corrupted, contains a reference to 'Chinese olympic weightlifting book' and metadata indicating it was generated by wkhtmltopdf, which can be used to create PDFs from web content. The primary attack pattern appears to be directing users to a multitude of external resources, potentially for SEO spam or to serve further malicious payloads.

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://vpgrou.brdge.org/uploads/1/3/0/6/130603698/130603698.html#chinese+olympic+weightlifting+book PDF link annotation
    • http://lanesportablerestroomsandseptic.com/uploads/1/3/0/5/130543373/pufoloz.pdfIn PDF document text
    • http://gracechengcare.com/uploads/1/3/0/6/130640218/6695705.pdfIn PDF document text
    • http://vixennaillacquer.com/uploads/1/3/0/6/130639304/wosekanufogore.pdfIn PDF document text
    • http://miamibikelawyer.com/uploads/1/3/0/6/130640133/8132457.pdfIn PDF document text
    • http://dishahealth.com/uploads/1/3/0/7/130776123/914bb6c.pdfIn PDF document text
    • http://dabispop.com/uploads/1/3/0/4/130483770/gezexozovibonoj_vapufo_saveg.pdfIn PDF document text
    • http://missouridwi.info/uploads/1/3/0/4/130483728/b52fa878.pdfIn PDF document text
    • http://karageorge.net/uploads/1/3/0/5/130588639/7721583.pdfIn PDF document text
    • http://www.4raven-tinypaws.nicolewhitewellness.com/uploads/1/3/0/6/130603936/dagam.pdfIn PDF document text
    • http://www.thecalliopeproject.com/uploads/1/3/0/7/130776809/2d7718.pdfIn PDF document text
    • http://www.tooldesignsolutions.com/uploads/1/3/0/6/130639714/8bfe8a.pdfIn PDF document text
    • http://buckhillcoffee.com/uploads/1/3/0/5/130547024/708716.pdfIn PDF document text
    • http://ml-md.com/uploads/1/3/0/7/130775704/jejevaredeve_bajonosepi_pikabuxepa.pdfIn PDF document text
    • http://www.homeimprovementheros.com/uploads/1/3/0/2/130291838/raxumurifubu_jozaxuvo.pdfIn PDF document text
    • http://acmbuenosaires.org/uploads/1/3/0/7/130740010/magukajomujazi.pdfIn PDF document text
    • http://cyber1risk.com/uploads/1/3/0/6/130639593/f549b98606.pdfIn PDF document text
    • http://pixieedust.com/uploads/1/3/0/2/130271083/xuferemuwofa-vatatoram.pdfIn PDF document text
    • http://alicevonlindenau.com/uploads/1/3/0/7/130740521/5274444.pdfIn PDF document text
    • http://videoglyph.org/uploads/1/3/0/2/130289734/puzuzoz.pdfIn PDF document text
    • http://ckmitryremodeling.com/uploads/1/3/0/6/130639882/6a6c1.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_off00007cf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF3 8612 bytes
SHA-256: 9c75b08805799babe065d576224073ba4d275ed2c04fe4b8414894081aed507e

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