MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.001 User Execution: Malicious Link
T1059.007 JavaScript
This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of URLs like 'https://chcial.ru/uplcv?utm_term=sophos+antivirus+mac+os+x' indicates a lure to download or interact with fake security software, likely leading to phishing or malware. No scripts were extracted, but the structure and URLs strongly suggest a phishing or malware distribution campaign.
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://chcial.ru/uplcv?utm_term=sophos+antivirus+mac+os+x PDF link annotation
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/e2a75551658a4faf2ad5d2ea96050956/2026856782.pdfIn PDF document text
- https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/f6107df5d5d0637578cab2b98870ebd2/57577138434.pdfIn PDF document text
- https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbb9875a74---jadulozinefaw.pdfIn PDF document text
- http://akkoryazilim.com/userfiles/file/zemanewetenaxepewigoniges.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5ef63460---91514390412.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16072b894cb2cf---39051458261.pdfIn PDF document text
- https://www.nexidia.it/wp-content/plugins/super-forms/uploads/php/files/19ad7d3c4e35809237ccd58b61d1b9b3/77015680125.pdfIn PDF document text
- https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/1a8e914d0b92dbc6a9724fc5506ca971/zewasuwuvubamifepe.pdfIn PDF document text
- https://ferado.vn/userfiles/file/35406979104.pdfIn PDF document text
- https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608041282d0e9---kelelugijutakolitofer.pdfIn PDF document text
- https://abofahed.com/userfiles/file/97159529781.pdfIn PDF document text
- https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/agpm46413tbpq5ljlm83c62iho/ladegibewefidukivuxal.pdfIn PDF document text
- http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/50scfll7k8637tn4ftncklpkd1/ginuneloxitogelo.pdfIn PDF document text
- http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/bfba26iqf07m47tbdkaeabahp6/60011013192.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_off0000e183.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE183 | 5372 bytes |
SHA-256: bf8b29c40468e7eb076252e55e4135f2d6d2dace30ec2f3f6cc72def16666a8b |
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font_01_sfnt_off0000f3a4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF3A4 | 10668 bytes |
SHA-256: d831d46ef160089143e2e37952fdb33a1d0c7b4c250f4886349f06d1bdf03982 |
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