MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics further supports the attack pattern of directing users to external, potentially harmful, websites.
Machine Learning
- Nyx PDF Classifier malicious score 0.9975
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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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=thinking+in+systems+a+primer+pdf PDF link annotation
- http://lavalnerina.it/userfiles/file/98297185851.pdfIn PDF document text
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614533a36a2f6---20912980535.pdfIn PDF document text
- http://soosanfix.com/upload/fckeditor/file/ponoxazojelire.pdfIn PDF document text
- http://www.scsk12.org/policy/files/files/xidib.pdfIn PDF document text
- http://lejuriste.ru/files/file/devusibeb.pdfIn PDF document text
- http://www.ocptecnology.com/admin/uploaded/fck/file/37291684085.pdfIn PDF document text
- https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/60757384123815eaaacb8c81bd30a4e6/vovakenuwebanavera.pdfIn PDF document text
- http://mcutech.net/upload/2021/09/file/1631142174833090564.pdfIn PDF document text
- http://sinice-rasy.cz/files/file/madulas.pdfIn PDF document text
- http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614526436ea45---26387185107.pdfIn PDF document text
- https://actor-conseil.com/files/file/zivikatep.pdfIn PDF document text
- http://ayrh.internet-match.com/upload/files/nititojuxokis.pdfIn PDF document text
- http://fioredda.com/userfiles/files/53601146356.pdfIn PDF document text
- http://www.sushmitamukherjee.com/fckimages/file/61710093086.pdfIn PDF document text
- https://intersensor.ro/v2011/Files/fck_upload/file/57357188083.pdfIn PDF document text
- http://redondoclassicburger.com/uploads/files/kulebinut.pdfIn PDF document text
- https://www.cascatai.com.br/ckfinder/userfiles/files/21017074703.pdfIn PDF document text
- http://rescue119.org/userfiles/file/mububizon.pdfIn PDF document text
- https://mrdak.cc/uploadfile/files/bewaz.pdfIn PDF document text
- http://1day2night.com/UserFiles/file/78793511697.pdfIn PDF document text
- http://lnianemarzenie.pl/userfiles/file/2422176104.pdfIn PDF document text
- http://studiosaletta.it/userfiles/files/96839790516.pdfIn PDF document text
- https://coffeetuanvang.com/Images_upload/files/30538241128.pdfIn PDF document text
- http://rosniyom.com/userfiles/files/70996781755.pdfIn PDF document text
- http://savitaco.com/uploads/images/files/nomexedo.pdfIn 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://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_off0000d76a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD76A | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000ef7c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEF7C | 16060 bytes |
SHA-256: 9b96040bba36a6dd551f6abc7759ee73972584acb6da21f26c5dfd0d95e6867e |
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font_02_sfnt_off000118dd.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x118DD | 10948 bytes |
SHA-256: d729e17164e04edfdc7ca2010b957a866e0a3478bd1a6fbce73c12e98411cb2a |
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