MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, hosting numerous PDFs on compromised CMS upload directories, likely to obscure the ultimate malicious destination. The presence of external URIs and the compromised CMS upload links suggest a multi-stage attack, potentially leading to further payload delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9999
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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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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://catamma.ru/uplcv?utm_term=fingerstyle+ukulele+tabs PDF link annotation
- https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/iusr7kk6l544cl38cl1c9u207k/bajeb.pdfIn PDF document text
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/afd0ff305f2907d70382ac51bf031c1d/93020308226.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9e9c0d1cd---24367565839.pdfIn PDF document text
- http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8489b44ac---62508768147.pdfIn PDF document text
- https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/0dd2e143f9e26faeae1bbda12fc33b9c/dafenus.pdfIn PDF document text
- https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/9d604a6d6fd52c41a39944613820b42a/70015527411.pdfIn PDF document text
- http://happysmilecard.com/uploads/files/gekixulowokerakovonome.pdfIn PDF document text
- https://rybczewice.pl/userfiles/file/73676718603.pdfIn PDF document text
- https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609bf7cf0b87e---fuzotopimop.pdfIn PDF document text
- http://grandchainfamilyfoundation.org/clients/85333/File/49679896031.pdfIn PDF document text
- http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160872cef393ae---8181235087.pdfIn PDF document text
- http://coffee33.ru/archive/file/votolixaperug.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ccfb779351---vofelovili.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de20949d80---mojunepu.pdfIn PDF document text
- http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073a3a2e3e8c---26871989280.pdfIn PDF document text
- http://creativeindustries.ru/uploads/userfiles/file/15878729627.pdfIn PDF document text
- http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073c9e90d9bd---poruj.pdfIn PDF document text
- http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607508b431135---4912938528.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000e7ba.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE7BA | 5116 bytes |
SHA-256: 9bb15fdffa7a858a0d541588bca433f14365d139ae121f4626ad61c46ec319bd |
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font_01_sfnt_off0000f942.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF942 | 11244 bytes |
SHA-256: 5bf334ce83fa2a2bc4471f8953bb7da4fcee6d63fb6db8a0b16a3eae287b59ff |
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