MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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://medvor.ru/uplcv?utm_term=manual+de+ecg+cardiopapers+pdf+download PDF link annotation
- https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/f53883e557520ab21595a8953adfe4bf/pozefupewi.pdfIn PDF document text
- https://aplusadvance.com/naver_editor/data/file/55129559335.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8107dd522---93595888303.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/f634d24d051bdbd24b53921ae88f44fb/81763934695.pdfIn PDF document text
- http://aldara-latinoamerica.com/userfiles/file/sewepuwukavabitixav.pdfIn PDF document text
- https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2ff4f6a93eb64cd99520beb564985a80/kidikadedosaj.pdfIn PDF document text
- https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/5c31ea204ef05bb996137db753a652cb/71633445904.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c91fe21ff---36036270846.pdfIn PDF document text
- https://aftaplan.com/works/peepsparty/html/upload_files/file/tejuvupe.pdfIn PDF document text
- https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cca1ef1ea1---kopararajasap.pdfIn PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f4d15022---zedagaba.pdfIn PDF document text
- https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e0abe93a7---60779949779.pdfIn PDF document text
- https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/3bd1e3410e714e7d7d5bc73d2fce23b7/44656809352.pdfIn PDF document text
- https://ahreco.com/uploads/news_file/kidajekemaxabenawonaw.pdfIn PDF document text
- http://allasclub.com/campannas/file/39884235081.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_off0000ce5c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCE5C | 5420 bytes |
SHA-256: d13f0c869107a71a7d76efc3399a21168b8a42d951cfd0e93c7c87c168c7919d |
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font_01_sfnt_off0000e0fc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE0FC | 12728 bytes |
SHA-256: 40ccbfa03f526a77bfd109fe0c120c24548c2b027e241c38a76a3aeba8b97fa2 |
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