MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting an attempt to host or redirect to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the interpretation of the document as a link farm designed for malicious redirection.
Machine Learning
- Nyx PDF Classifier malicious score 0.9992
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://firsatpin.com/calisma2/files/uploads/xuwifada.pdf In PDF document text
- https://nslogisticservice.com/userfiles/files/91558931216.pdfIn PDF document text
- http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f345bf2942---65629574608.pdfIn PDF document text
- https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614bb30400986---xesusugu.pdfIn PDF document text
- https://sindhuinvestment.com/ckfinder/userfiles/files/tukerisogadipajusof.pdfIn PDF document text
- http://beloezoloto.ru/userfiles/file/15229555458.pdfIn PDF document text
- https://batikatravels.com/userfiles/file/48846488199.pdfIn PDF document text
- http://guerrazzi.info/userfiles/files/sagapaduzemukivelokavuni.pdfIn PDF document text
- https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16139004dc1ef8---36405847580.pdfIn PDF document text
- https://landbondcorten.com/attachment/file/d6f202ea0fb88729fd0234744d551003.pdfIn PDF document text
- http://tjsijiqing.com/ckfinder/userfiles/files/2021/0911/e13ef7e33dc73ab913acd73cd042413f.pdfIn PDF document text
- http://nollve.com/img/editor/image/file/39869082063.pdfIn PDF document text
- http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/97359484873.pdfIn PDF document text
- http://execdentalclinic.com/uploads/ckfinder/userfiles/files/refuler.pdfIn PDF document text
- http://softtox.com/new/userfiles/file/bafovuguvenimaledudis.pdfIn PDF document text
- https://suruburi.net/mm/file/43725310096.pdfIn PDF document text
- https://perfecthospital.net/FCKeditor/file/54222594963.pdfIn PDF document text
- https://ms2oke.com/contents/files/ketevopugufawotaxeb.pdfIn PDF document text
- http://cuahuyhoang.com/media/ftp/file/gabatuxaxapananixerujeg.pdfIn PDF document text
- http://homeopathyhk.com/files/49732046005.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=slow+cooker+stoviesPDF 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://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_off0000ac32.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xAC32 | 16720 bytes |
SHA-256: 231920a1669371a0bfdf87c4927fdcc973f2d0146ce9a9b6ab32d3a0e347548b |
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font_01_sfnt_off0000d695.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD695 | 10276 bytes |
SHA-256: 83cfaf26673b521bd956138097b1cd8f29c60d3aef3cff9dcc1afe9607012cb5 |
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font_02_sfnt_off0000ede4.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDE4 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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