Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86c0432730be506…

MALICIOUS

PDF

33.8 KB Created: 2020-06-08 08:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-15
MD5: f548949136327f744100b2efc697ab40 SHA-1: 3a6ab18bc7ede4eb3bcb78f0f51ae822bcfebcf3 SHA-256: a86c0432730be5062ffca290eccb4d5a8af7f6e8f976f85a86a2970561971018
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to numeric or keyword-stuffed URLs on various domains. This pattern is indicative of SEO spam or a link farm designed to manipulate search engine rankings or redirect users to malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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://lizreinertson.com/uploads/1/3/1/3/131383726/131383726.html#reawakening+tv+show+season+2+episode PDF link annotation
    • http://clairpictures.com/uploads/1/3/1/4/131438234/b1778ed4.pdfIn PDF document text
    • http://lake7falls.com/uploads/1/3/0/3/130323187/katiliv_sodifudage_resifukazesupa_niwatepox.pdfIn PDF document text
    • http://gallatinffaalumni.com/uploads/1/3/0/7/130776499/bovidila.pdfIn PDF document text
    • http://021guojiyulehuisuo.br3h.com/uploads/1/3/1/6/131636753/2c579d4c.pdfIn PDF document text
    • http://4gj.undesirable.us/uploads/1/3/0/6/130603975/0f4be9cf08.pdfIn PDF document text
    • http://andreacoleconsulting.com/uploads/1/3/0/8/130813652/xonulawan.pdfIn PDF document text
    • http://turnbyturnweather.com/uploads/1/3/0/6/130620366/2228335.pdfIn PDF document text
    • http://plushwigfactory.com/uploads/1/3/0/4/130477003/c9a8f8abfa36924.pdfIn PDF document text
    • http://mail.emmetcd.org/uploads/1/3/1/8/131857211/3461780.pdfIn PDF document text
    • http://curtisig.com/uploads/1/3/1/1/131164506/demetuvotumedok.pdfIn PDF document text
    • http://getthegreenedge.com/uploads/1/3/1/8/131856052/12bed44c05bab.pdfIn PDF document text
    • http://blueware.co.uk/uploads/1/3/1/4/131407263/tabepov.pdfIn PDF document text
    • http://redhawkfood.org/uploads/1/3/0/4/130435609/luxaxajazewudokino.pdfIn PDF document text
    • http://meetcoe.com/uploads/1/3/1/4/131406784/rufabazunanut_zikurijekimeme_vizapigijadi_kuderejipe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vixifujeva.files.wordpress.com/2020/06/40236195447.pdfIn PDF document text
    • https://sotuvevom.files.wordpress.com/2020/06/34110047779.pdfIn PDF document text
    • https://fokolivemuxe.files.wordpress.com/2020/06/jizimibigafukasin.pdfIn PDF document text
    • https://waxukuvovatu.files.wordpress.com/2020/06/56376937845.pdfIn PDF document text
    • https://bizesipu.files.wordpress.com/2020/06/23495343762.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
    • http://scripts.sil.org/OFLIn 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_off000058f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F4 10372 bytes
SHA-256: 41d96f20ebf5aa15bdac2925a099dea02d5f82376758604cb0b6f1fa22370952

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