MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the heuristic firings and URL patterns point towards a spearphishing attachment used to redirect users to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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://infrive.ru/uplcv?utm_term=engineering+mechanics+statics+8th PDF link annotation
- http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/pb8dppo5gmepgk4ipij40cdstn/jogubawakibidewaregovewi.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3c358ae07---ritexegevu.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/cknf8pg94t8687tlhf7d98fem3/dekozegegaromezit.pdfIn PDF document text
- https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/g6jq86o8dqvc3tq4vhpm96qsd2/nunuko.pdfIn PDF document text
- http://shethof.ch/cgi-bin/dynamisch/file/45331534040.pdfIn PDF document text
- https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086ac79d7589---3690810385.pdfIn PDF document text
- https://baongochoa.com/upload/file/lulufikorituzodat.pdfIn PDF document text
- https://aviseco.ro/userfiles/file/panetuxekefomos.pdfIn PDF document text
- http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078688bed84d---91606818691.pdfIn PDF document text
- http://apexnepaltravel.com/userfiles/file/putakasoxuvewupivojifuxem.pdfIn PDF document text
- http://goteneplast.se/files/images/file/52106147943.pdfIn PDF document text
- http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a99218a1b8---87778420882.pdfIn PDF document text
- https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abfd62ee6b4---vefewanavudokasenavipo.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
- 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_off0000ffd5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFFD5 | 5332 bytes |
SHA-256: 05a12b27bfa3c6e0fcce1a66597c206b7c7f52a4f97113af96b7f4a065569ebf |
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font_01_sfnt_off000111d0.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x111D0 | 12316 bytes |
SHA-256: 9cc900b6903bd2ee6c8c895cda2657f41e7f8526404a404838d105bf9ef2006c |
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font_02_sfnt_off00013b2f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13B2F | 16108 bytes |
SHA-256: 92e9eef5bab5402cd28dd78cc952917dc1e917ec0366d544209aa8acab859a07 |
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