Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5920f9b777cce05…

MALICIOUS

PDF

33.9 KB Created: 2020-04-02 17:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: f775ec6f7613ce24112a00df32f1fc93 SHA-1: 6a22018c9b36ba55625947927328dc73c5049145 SHA-256: d5920f9b777cce055b20f07bcd759208074a213dccb5e51db303cd39c2d4318d
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicating a link farm or SEO spamming operation. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves directing users to a vast collection of external URLs, likely to manipulate search engine rankings or distribute 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://directorsofficersliabilityinsurance.wales/uploads/1/3/1/0/131070401/131070401.html#imagenes+con+ba+be+bi+bo+bu
    • http://lllfoundation.com/uploads/1/3/0/7/130775775/baxoxuvasuwanasadima.pdf
    • http://geniusdietpills.net/uploads/1/3/0/7/130738499/jalijagirud.pdf
    • http://eastgateinstitute.com/uploads/1/3/0/3/130313082/gemapizorisu.pdf
    • http://alienbooksprague.com/uploads/1/3/0/5/130540063/topojokojowidurajo.pdf
    • http://zoonmaiaflutes.com/uploads/1/3/0/7/130776564/zejeriwepata.pdf
    • http://rtocycles.com/uploads/1/3/0/7/130740492/besuwoxajanew.pdf
    • http://financialcoachingshop.com/uploads/1/3/0/3/130323806/tikaputesupavikisil.pdf
    • http://healthinfolab.com/uploads/1/3/0/5/130544447/0d894ec6.pdf
    • http://suzipedia.net/uploads/1/3/0/7/130775935/5778869.pdf
    • http://guardianmortgagegroup.com/uploads/1/3/0/5/130588291/8837440.pdf
    • http://wibier.nl/uploads/1/3/0/6/130621128/e086845247a94.pdf
    • http://altaredmedia.com/uploads/1/3/0/7/130776801/6747369.pdf
    • http://mfayad.com/uploads/1/3/0/7/130740053/6203d.pdf
    • http://divorcecounselorchicago.com/uploads/1/3/0/8/130874585/177e8647.pdf
    • http://bwhousein.com/uploads/1/3/0/6/130639315/dilibejumubupis-pebamu.pdf
    • http://ochoa-family.net/uploads/1/3/0/6/130639152/zokadonowibofo_ziwileg_nagudu.pdf
    • http://condorvisuals.net/uploads/1/3/0/5/130588336/9072819.pdf
    • http://floridastitleservices.com/uploads/1/3/0/5/130589104/5304985.pdf
    • http://luxurydaytonahomes.com/uploads/1/3/0/7/130776775/2175803.pdf
    • http://mfindia.org/uploads/1/3/0/5/130550914/10ecdd3faf8d37d.pdf
    • http://ldrinteriors.com/uploads/1/3/0/5/130589217/6ad2dab5.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_off00005d1c.bin
552aeaf3e0c84017177c1352ed93414dc24c534082fcf36a36236cdbf9497a61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D1C 7420 bytes

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