PDF malware analysis — malicious · f32d90ca80d1ba32

MALICIOUS

PDF

79.2 KB Created: 2021-08-01 21:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27

MD5: 22f2a245cab469b3f2922ad350f6b838 SHA-1: 9bbf1256357a495a559f64a2f9e9470605ae18ea SHA-256: f32d90ca80d1ba32f1193e1131748fd84cc612ba634d8469cc462c2ac68696b5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised websites, many of which are hosted on WordPress installations using the 'super-forms' plugin. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The primary function appears to be redirecting users to potentially malicious content hosted on these compromised sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9936

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/da8514ac47cebf7834b42c68d6f737a8/80083829565.pdf In PDF document text
- http://metisentry.net/ckfinder/userfiles/files/29884448196.pdfIn PDF document text
- https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/f74da48edfb824e096b089ca7b535af2/14231602727.pdfIn PDF document text
- https://amitadevnani.com/userfiles/file/1917149812.pdfIn PDF document text
- http://telmeed.com/web/ckfinder/userfiles/files/47768706415.pdfIn PDF document text
- https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b3a0ea84b5d167842bf30d588edac30a/68909348794.pdfIn PDF document text
- http://daming-school.com/userfiles/file/60047736026.pdfIn PDF document text
- http://limoride.net/gallery/file/63579491183.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e4c2e7693ed---kokexapedasozufitidadotek.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c0565a952---24225192478.pdfIn PDF document text
- http://omatsuri.kr/data/userfiles/files/nopilugorux.pdfIn PDF document text
- http://amphorabeautyclub.com/campannas/file/37220389349.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160dc92d0d6269---92446711748.pdfIn PDF document text
- http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/82560280122.pdfIn PDF document text
- http://ncabhsa.com/clients/875427/File/teluxonoseraxogixokep.pdfIn PDF document text
- http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c85fd4813a---84946197636.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/2cbba8a1265a2c0f157544362b0c1b7f/dujoladitizizemupog.pdfIn PDF document text
- https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e21e8ced6ad---48554261213.pdfIn PDF document text
- https://pt2-turbo-j3t.com/contents//files/milubipijosanelagipaz.pdfIn PDF document text
- http://midel.me/userfiles/file/67136970504.pdfIn PDF document text
- http://lindseyderence.com/userfiles/files/85341597743.pdfIn PDF document text
- https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/b98037ecfd3527fc7f05a8c90d3b245c/dolenuwaluzipogexado.pdfIn PDF document text
- https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/6765bd6b5ae6f56316ed042abf22044e/79719330415.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/c1d169163ac6f22707458439de149841/bazafejudisedufawaf.pdfIn PDF document text
- http://losmarinoslanzarote.com/marinarubicon/admin/file/86928210643.pdfIn PDF document text
- http://ardechetendancebrut.fr/userfiles/ardechetendancebrut.fr/file/xugetavivonidojitidixewoz.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=livro+metodologia+cientifica+lakatos+e+marconi+pdfPDF link annotation
- http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/dodilizinuralosonulopa.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://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_off0000cd02.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD02	18096 bytes
SHA-256: `71b75dd3c81da4dfbc00bb07c798fbe5f40e4e0d5202c7bb1d2b5008a8534851`
`font_01_sfnt_off0000f9db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9DB	11080 bytes
SHA-256: `6e75e8545d80e3459798243878ad8baaa2695057aa1a0ff3aeda7c7d634891ef`
`font_02_sfnt_off00011380.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11380	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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