PDF malware analysis — malicious · c5c196cb67180b6f

MALICIOUS

PDF

70.4 KB Created: 2021-09-17 00:31:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: ed0a809e44eed0b405ba7d220bdce674 SHA-1: d6bfb8fadc669f8e909c441db5ead77476e6aacf SHA-256: c5c196cb67180b6f3a9edaaa0be72c6940902bded7966c17cc107af7ef35a673

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate attempt to obscure the true destination or leverage compromised infrastructure.

Machine Learning

Nyx PDF Classifier malicious score 0.9849

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 http://shlawllc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ravuvaliviwexadiwav.pdf In PDF document text
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161376e9248b02---7850015297.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322a1b56d46---tireni.pdfIn PDF document text
- http://gatewayhotelbangkok.com/upfile_hotel/files/29829691961.pdfIn PDF document text
- https://vanrun-it.nl/userfiles/files/buzenumixi.pdfIn PDF document text
- http://abwsalisbury.com/uploads/files/99199980346.pdfIn PDF document text
- http://022-web.cn/uploadfile/file/20210905005705513.pdfIn PDF document text
- http://coral-travel66.ru/admin/ckfinder/userfiles/files/xejakogefupub.pdfIn PDF document text
- http://chikatere.com/Upload/files/59205241895.pdfIn PDF document text
- http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0abca86dd---gijaraze.pdfIn PDF document text
- https://netshopnepal.com/userfiles/file/33801220147.pdfIn PDF document text
- http://retrolondontees.com/userfiles/file/zapetusuverajopekine.pdfIn PDF document text
- https://eseninternational.com/uploads/files/32408057632.pdfIn PDF document text
- http://kursadowicz.pl/Upload/file/wewek.pdfIn PDF document text
- http://infrabud.eu/fckpliki/file/ladajinanupedojufato.pdfIn PDF document text
- https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c6cfe25d7---49534094268.pdfIn PDF document text
- http://tsradviseurs.nl/mailing/images/photo/file/5517084769.pdfIn PDF document text
- https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613888bc29d86---28176820089.pdfIn PDF document text
- https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/3dd07a2defd2f66ff045c889e1397f33/tadebef.pdfIn PDF document text
- http://dailymaytrogiang.com/userfiles/files/52564541584.pdfIn PDF document text
- http://yushendesign.com/images_fck/file/1630920693.pdfIn PDF document text
- https://ihappywash.com/uploads/files/202109102056412640.pdfIn PDF document text
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/3aa08ff715f430ef8664669acd4e1345/lixonuvi.pdfIn PDF document text
- http://j1ent.com/userfiles/file/20210902123757.pdfIn PDF document text
- http://www.fuchingrading.com/upload/file/50585143612.pdfIn PDF document text
- https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/4ca18384b37740d9386c7419e4ebc7c8/ferutazuwurilo.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=evil+dead+book+pdfPDF 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_off0000b40e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB40E	15956 bytes
SHA-256: `03ec12b6e237024f8d9b2e26c25586e5307f5dcd943d8071fd772f1b7f2acdbe`
`font_01_sfnt_off0000dcce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCCE	10304 bytes
SHA-256: `c8f5085d07c21ecd71d4d589b1a0b743240f0cf60cee970d7c0a40e9c76b8b46`
`font_02_sfnt_off0000f3d3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3D3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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