Malicious PDF — malware analysis report

Static analysis result for SHA-256 47340e0d9afbda9e…

MALICIOUS

PDF

40.5 KB Created: 2020-03-28 09:23:37 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: b7b4ee13eb1f7b38a987bd679186e682 SHA-1: 1acf50a14f80d2f213741e920664f2036a8d4de2 SHA-256: 47340e0d9afbda9ef6a65e99c11e1183e879ece01f1b95a7eadcfa9fc4beb10e
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 structured as SEO-optimized PDF documents hosted on various domains. The document body, though partially corrupted, suggests a lure related to educational material. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the mass linking behavior. The primary attack pattern involves redirecting users to a network of potentially malicious or spam-hosting websites.

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://bartolomeilaw.com/uploads/1/3/0/7/130738758/130738758.html#libro+de+formacion+3+de+secundaria+contestado PDF link annotation
    • http://silverarcherdesigns.com/uploads/1/3/0/3/130313111/222293.pdfIn PDF document text
    • http://humanswhy.com/uploads/1/3/0/4/130483872/40a18.pdfIn PDF document text
    • http://pedaaleducation.org/uploads/1/3/0/6/130620828/4fac7dd5053.pdfIn PDF document text
    • http://www.frankensteinanthology.com/uploads/1/3/0/9/130969237/dufepiz.pdfIn PDF document text
    • http://beccamccroryhairpro.com/uploads/1/3/0/3/130313183/jiferedajakevim_zaxomo_maratopefo_mosuwomipum.pdfIn PDF document text
    • http://rivervistafinancing.com/uploads/1/3/0/6/130604363/8717878.pdfIn PDF document text
    • http://beautifulattitudevgg.com/uploads/1/3/0/2/130289283/vijufa.pdfIn PDF document text
    • http://highcaliberconstruction.org/uploads/1/3/0/7/130775195/dad371830.pdfIn PDF document text
    • http://styer-fitzgerald.net/uploads/1/3/0/5/130550768/4898eabea12b81b.pdfIn PDF document text
    • http://westech-rides.com/uploads/1/3/0/4/130435680/1434457.pdfIn PDF document text
    • http://mta-sts.mx.momentum-behavioral.com/uploads/1/3/0/6/130639074/wulijunomab.pdfIn PDF document text
    • http://simplyparisgifts.net/uploads/1/3/0/6/130639653/binupenekeres.pdfIn PDF document text
    • http://lanzarote-immobilien.info/uploads/1/3/0/3/130379101/3cba5.pdfIn PDF document text
    • http://flebdevelopment.com/uploads/1/3/0/7/130739758/7304660.pdfIn PDF document text
    • http://www.juliacdupuis.com/uploads/1/3/0/6/130620772/8867218.pdfIn PDF document text
    • http://nathanielrichguitars.com/uploads/1/3/0/2/130272385/5129342.pdfIn PDF document text
    • http://japanteas.com/uploads/1/3/0/5/130588278/liposo_museraro_gonetazamomulin_nekanudanozu.pdfIn PDF document text
    • http://slidebyslidephysicsrevision.com/uploads/1/3/0/7/130739401/debomaxemujumu_xoponizopu_mavos_konizefuz.pdfIn PDF document text
    • http://shopmavenhouseinteriors.com/uploads/1/3/0/9/130969372/2430917.pdfIn PDF document text
    • http://butlercleanersandlaundry.com/uploads/1/3/0/9/130969884/bekofigegafu.pdfIn PDF document text
    • http://mike-at-play.com/uploads/1/3/0/9/130969225/4559928.pdfIn PDF document text
    • http://thepovs.com/uploads/1/3/0/2/130270869/benaxuwufanem.pdfIn PDF document text
    • http://desvosges.com/uploads/1/3/0/5/130550760/lolizabijuj.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_off000074d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74D8 8464 bytes
SHA-256: a1d91946c9e7a12b0a4314e8785d81088c759d9bddc62fb24b3b98aa65548984

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