PDF malware analysis — malicious · fd6f4050986b8ab4

MALICIOUS

PDF

94.7 KB Created: 2021-09-01 08:04:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 24a1e00088c88ce971407ae9a4205988 SHA-1: 130c1f6153a434d8616e5a0e97915f5aebed3f3e SHA-256: fd6f4050986b8ab46c4d65ced5d9079fab80b63949e648e14809676624f54df4

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple external URIs indicates a likely attempt to redirect users to potentially harmful websites. No scripts were extracted, but the structure and URL patterns are indicative of a malicious distribution or redirection scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9866

Heuristics 5

PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
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 https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/75efeed69607970a4d70f48ee6240f24/12893837588.pdf In PDF document text
- https://smilepaper.tw/archive/upload/files/75953009884.pdfIn PDF document text
- http://kuresi-kaitori.com/upload/content_pic/files/2238387071.pdfIn PDF document text
- http://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/xeripoj.pdfIn PDF document text
- http://www.ville-dammarie.com/ckfinder/userfiles/files/89050310933.pdfIn PDF document text
- https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/d699a85e4e6465e0a69f25d3529e2980/dukidofamadewibazonu.pdfIn PDF document text
- https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/efdf68d884aa2c3a4b2dcb8ed84eb1be/53569951508.pdfIn PDF document text
- https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/716stkbs4bhspenpg4o3fk2gsv/70722926968.pdfIn PDF document text
- http://mim2010.ru/userfiles/file/lasifij.pdfIn PDF document text
- https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f106ab6334ac427d852159dde5b4f83/jatogafogoxapowimifoxu.pdfIn PDF document text
- https://cailux.lu/userfiles/files/49906041950.pdfIn PDF document text
- https://aghs.in/ckfinder/userfiles/files/dejafatarowopakorigodaf.pdfIn PDF document text
- https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160badc3663f15---73947870286.pdfIn PDF document text
- http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfec5dd6dfa---xuwosanajinunaga.pdfIn PDF document text
- http://svazekobciorlice.cz/userfiles/file/27913684591.pdfIn PDF document text
- https://too.kg/wp-content/plugins/super-forms/uploads/php/files/3ab7b58eb161ef1c0858a4f1ca0b99c6/76382082790.pdfIn PDF document text
- http://thetuckerfamilyreunion.com/clients/67950/File/36759251825.pdfIn PDF document text
- https://miguktour.com/FileData/ckfinder/files/20210822_D970C2B1B5D104E2.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/e3bfe85b14caeef821be0a779c61d980/supizuliginejuji.pdfIn PDF document text
- https://www.blondel-bois.fr/ckfinder/userfiles/files/firibovos.pdfIn PDF document text
- http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608083a95b31f---96209244218.pdfIn PDF document text
- https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/704928599dd8c15d8e1fe2fe85fd5873/95285629925.pdfIn PDF document text
- https://vanvoorst.info/uploaded/file/zovexaxisojavipon.pdfIn PDF document text
- https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/57bff4e497c0fcdcfab67fe20a37e09b/4745717956.pdfIn PDF document text
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/bs3sq84eej3a0uoqdhh9ss1iio/17981430506.pdfIn PDF document text
- http://pfmconsulting.org/survey/userfiles/files/50317555314.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=pdf+telecharger+clubicPDF link annotation
- 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010caa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CAA	10604 bytes
SHA-256: `a3a8027e43fc852e2e5d3fd0476260a23d9e4e0298a9b50aa1fe35e83f4043db`
`font_01_sfnt_off000124c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x124C4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013cd6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13CD6	18084 bytes
SHA-256: `21cc487a82ab4e974282d034f66029524f564ccdcc1235eb1edb0e0c2f8c6af2`

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