Malicious PDF — malware analysis report

Static analysis result for SHA-256 c431de83d938d56d…

MALICIOUS

PDF

33.3 KB Created: 2020-05-16 22:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 35d4bb5c19d4fb3d5359766f7126ed8a SHA-1: 13ed7280e4cebf1f59dce79ab0ee1456f6a427df SHA-256: c431de83d938d56da33230545e7d06cc459621a8381b38ae26a5a3466407c248
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though heavily obfuscated, contains references to 'Better homes and gardens australia fact sheets' and the authoring application 'wkhtmltopdf', suggesting a lure for potentially unsuspecting users. The primary function appears to be directing users to a network of websites, likely for SEO spam or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://xrossingborders.net/uploads/1/3/0/9/130969774/130969774.html#better+homes+and+gardens+australia+fact+sheets
    • http://laurelirene.com/uploads/1/3/0/8/130814960/216863b28b1.pdf
    • http://stevenmatos.studio/uploads/1/3/1/3/131381489/4048261.pdf
    • http://villagemomentum.com/uploads/1/3/0/4/130489222/vetuvijunupi.pdf
    • http://taptissparkleto.com/uploads/1/3/0/5/130538937/6645078.pdf
    • http://pagmiami.net/uploads/1/3/1/4/131406709/c1cd13669a.pdf
    • http://akersacres.com/uploads/1/3/1/3/131380146/2d1431b37c.pdf
    • http://spd.services/uploads/1/3/0/6/130621194/nozozedibojinuz.pdf
    • http://gypsysparklellc.com/uploads/1/3/0/4/130483638/xidegusow-barorera-lovibaz-mokedomo.pdf
    • http://donnasleadershipsolutions.com/uploads/1/3/1/4/131438121/sagawopo.pdf
    • http://duoart.org/uploads/1/3/1/6/131637371/5147bd5c.pdf
    • http://buildthatbusiness.com/uploads/1/3/0/6/130604004/giwisafuke.pdf
    • http://lisakleinspeech.com/uploads/1/3/0/5/130588384/5562540.pdf
    • http://yandino.org/uploads/1/3/1/4/131453031/xujamo.pdf
    • http://itisfantastic.com/uploads/1/3/0/5/130589339/f2b5f56.pdf
    • http://cbdfuturerevolution.com/uploads/1/3/0/9/130969353/3902212.pdf
    • http://rnfincaraiz.com/uploads/1/3/0/7/130776102/tenore_debapapigifuwi.pdf
    • http://jamaicaadz.com/uploads/1/3/1/4/131453348/fc3d9.pdf
    • http://beaudoinpercussion.com/uploads/1/3/1/1/131164023/vagepepo.pdf
    • http://daniellestumblers.com/uploads/1/3/0/2/130272356/1aba49041c31a.pdf
    • http://southamericarealstate.com/uploads/1/3/0/9/130969327/7070800.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000057c2.bin
28e6db3df6697959ad906bbb30830bc15ecc870b05bb9d30c3c090d4979aea91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57C2 9804 bytes

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