PDF malware analysis — malicious · eb57091be7f6abdf

MALICIOUS

PDF

88.3 KB Created: 2021-09-07 16:04:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 6f032f212c92dd8ed317c4d61da6844c SHA-1: 3b993c5e8efaa85e0972ca703201418799777ea3 SHA-256: eb57091be7f6abdff45c98542c2af5882087c8452909f3ce651504ec252c913a

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous external URIs and links to compromised CMS uploads, suggesting it is designed to redirect users to potentially harmful content. The presence of a link farm on disposable hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=dictionnaire+anglais+arabe+pdf+gratuit PDF link annotation
- http://jakpaisanestate.com/images/upload/files/33058356011.pdfIn PDF document text
- https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/ibmovc84sgqmoj0vcaihimb1vb/95139890392.pdfIn PDF document text
- http://graham1978.com/clients/79565/File/tiwesasefixo.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c2c34ba79bf---sawakamemupefez.pdfIn PDF document text
- http://whsclass1968.com/clients/f/f8/f849445bb2fb8f42e7c863050dc1ba38/File/24437418487.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8075bc54d---mixedafik.pdfIn PDF document text
- https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae01911b55---29828675356.pdfIn PDF document text
- http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16134c64ae64db---52394845311.pdfIn PDF document text
- http://dambi.pl/userfiles/file/kowojozizesanivazedawema.pdfIn PDF document text
- https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/81h54buec4bg2m1v1c61ft5l82/domakajegizebapi.pdfIn PDF document text
- https://kochitaxirental.com/ckfinder/userfiles/files/xaxag.pdfIn PDF document text
- http://tweddlefoto.com/files_contenidos/upload/files/pulofujoduja.pdfIn PDF document text
- http://fruitofthespiritcatering.com/clients/9/9e/9e5e3efd27976f294ade36eaf76108d7/File/purafaxosa.pdfIn PDF document text
- https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160741cd1a4dde---23440750663.pdfIn PDF document text
- https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/ea5a38d8f5316c44a46aa0c54d90b65e/340730026.pdfIn PDF document text
- http://adaviestransportltd.com/userfiles/file/55665773001.pdfIn PDF document text
- http://www.dean-cpa.com/files/adminpic/file/meluragedaf.pdfIn PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cacd0cc2e26---17044532581.pdfIn PDF document text
- https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/u8ndq6h2bk5hjgelar2baumj57/31228251417.pdfIn PDF document text
- http://studiofantino.it/userfiles/files/81816712806.pdfIn PDF document text
- http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3445e6c91---92362669225.pdfIn PDF document text
- https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/1d0f04d74588700211d78e433dc03d4d/75294235271.pdfIn PDF document text
- https://sunnyvale.com/wysiwygfiles/file/nuberifomotilu.pdfIn PDF document text
- http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093ce0cc2dcc---xesabomipumibadaxe.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_off0000ebba.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEBBA	20620 bytes
SHA-256: `910b6897a34a694095e2d82c7fabe14dc6ec4b26961211d330d2e90bffe82ea8`
`font_01_sfnt_off00012047.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12047	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001385e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1385E	11036 bytes
SHA-256: `ebccdf52f21dc64c05ffd85f5b3955fc19dd22ff4cbe7f9de8412b50b69ee363`

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