MALICIOUS
104
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 6
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PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARMPDF 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.
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Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARMSmall 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.
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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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External URI info PDF_URIPDF contains an external URL action
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Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTALThe 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.
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Embedded URL info EMBEDDED_URLOne 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://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdfde1b8a8---gubodexirive.pdf In PDF document text
- http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/ikg4hdd2oj079n6omkonqf4ju1/foxesolar.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a58c23f2ad8---2136027141.pdfIn PDF document text
- http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ee8a31c4fb---favigutabarube.pdfIn PDF document text
- http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609846c523d5a---67557246381.pdfIn PDF document text
- https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/e3e7ec1625526fe2cfe0da412ef78df5/nofovoxajiguzejotode.pdfIn PDF document text
- http://anhuizhkj.com/upload_fck/file/2021-4-30/20210430042056742764.pdfIn PDF document text
- https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/db709a9deec5a3ed91f10d1288632ac0/nawulogimawetusijixe.pdfIn PDF document text
- http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b25822db1e5---pufofo.pdfIn PDF document text
- https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/5e9465a167318de980a81e078acdabfd/54159342732.pdfIn PDF document text
- http://sun-tes.ru/files/file/musuduvuredinavegek.pdfIn PDF document text
- http://fd-health.com/upload/ckeditor/files/13385200321.pdfIn PDF document text
- https://istanajpdua.com/contents//files/fapusedigezojema.pdfIn PDF document text
- http://notarbrazda.cz/userfiles/file/61724011410.pdfIn PDF document text
- http://55thocscompany.com/clients/62662/File/34060945096.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=create+pdf+from+svgPDF 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f6f3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF6F3 | 5296 bytes |
SHA-256: 0fe4aa582f8255cdb98c7144b2899ffc1dba1f1a2cd9a7ba342fe28643f88dc3 |
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font_01_sfnt_off000108e0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x108E0 | 2848 bytes |
SHA-256: 9ac40b0994e9c38f9e28c188e0d522c7567ff2867fa5a8d24d00839eb8485ddc |
|||
font_02_sfnt_off000114c9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x114C9 | 12340 bytes |
SHA-256: a03a98284f6724aaee9c81ce520c17ff5cf19a3675136db815fd075af81b7d8c |
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