PDF malware analysis — malicious · 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)

MD5: f548949136327f744100b2efc697ab40 SHA-1: 3a6ab18bc7ede4eb3bcb78f0f51ae822bcfebcf3 SHA-256: a86c0432730be5062ffca290eccb4d5a8af7f6e8f976f85a86a2970561971018

94 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
- http://clairpictures.com/uploads/1/3/1/4/131438234/b1778ed4.pdf
- http://lake7falls.com/uploads/1/3/0/3/130323187/katiliv_sodifudage_resifukazesupa_niwatepox.pdf
- http://gallatinffaalumni.com/uploads/1/3/0/7/130776499/bovidila.pdf
- http://021guojiyulehuisuo.br3h.com/uploads/1/3/1/6/131636753/2c579d4c.pdf
- http://4gj.undesirable.us/uploads/1/3/0/6/130603975/0f4be9cf08.pdf
- http://andreacoleconsulting.com/uploads/1/3/0/8/130813652/xonulawan.pdf
- http://turnbyturnweather.com/uploads/1/3/0/6/130620366/2228335.pdf
- http://plushwigfactory.com/uploads/1/3/0/4/130477003/c9a8f8abfa36924.pdf
- http://mail.emmetcd.org/uploads/1/3/1/8/131857211/3461780.pdf
- http://curtisig.com/uploads/1/3/1/1/131164506/demetuvotumedok.pdf
- http://getthegreenedge.com/uploads/1/3/1/8/131856052/12bed44c05bab.pdf
- http://blueware.co.uk/uploads/1/3/1/4/131407263/tabepov.pdf
- http://redhawkfood.org/uploads/1/3/0/4/130435609/luxaxajazewudokino.pdf
- http://meetcoe.com/uploads/1/3/1/4/131406784/rufabazunanut_zikurijekimeme_vizapigijadi_kuderejipe.pdf
- https://vixifujeva.files.wordpress.com/2020/06/40236195447.pdf
- https://sotuvevom.files.wordpress.com/2020/06/34110047779.pdf
- https://fokolivemuxe.files.wordpress.com/2020/06/jizimibigafukasin.pdf
- https://waxukuvovatu.files.wordpress.com/2020/06/56376937845.pdf
- https://bizesipu.files.wordpress.com/2020/06/23495343762.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.

Filename	Kind	Source	Size
`font_00_sfnt_off000058f4.bin` `41d96f20ebf5aa15bdac2925a099dea02d5f82376758604cb0b6f1fa22370952`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x58F4	10372 bytes

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