MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm pointing to multiple external URLs, some hosted on compromised WordPress sites. The presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt, likely initiated via spearphishing.
Machine Learning
- Nyx PDF Classifier malicious score 0.9990
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://inwebjor.ru/uplcv?utm_term=strategic+human+resource+management+exam+questions+and+answers+pdf PDF link annotation
- http://mvclassof1990.com/clients/8/8c/8ca0ba2c7a07c5cd1f21f9fc323c16c5/File/21588909182.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607322dd845e8---fiduzudiv.pdfIn PDF document text
- http://fkjz.cn/upload/files/2021/08/202108141431167988.pdfIn PDF document text
- http://slsnn.ru/content/files/47518021571.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160acb8e362561---rusowib.pdfIn PDF document text
- http://kme-kme.cz/files/file/tisimivem.pdfIn PDF document text
- https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/54953205288.pdfIn PDF document text
- https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078a200df7a8---gixuduzalamarasixoti.pdfIn PDF document text
- https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d049ac6845b020b360a15a552672b40d/fesodabelixunom.pdfIn PDF document text
- http://marketherballize.com/ckfinder/userfiles/files/95160032209.pdfIn PDF document text
- https://cmsschoolkg.org/userfiles/file/mudup.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160827596063e7---45508926978.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/v3qhkvrontfrrm4abvddlvmj2r/rupinijazivo.pdfIn PDF document text
- http://ud2-140.com/files/97396664220.pdfIn PDF document text
- https://areicon.com/images/file/zijemitovuz.pdfIn PDF document text
- http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/webufebatufenuronisijid.pdfIn PDF document text
- http://tnslib.net/userfiles/files/30165984794.pdfIn PDF document text
- http://npi-management.com/ressource/site-image/files/moligulafikuxawifezuxu.pdfIn PDF document text
- https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1608de21695215---60372417659.pdfIn PDF document text
- http://canhtoanland.com/upload/files/mogis.pdfIn PDF document text
- https://aadhaarretail.com/administrator/imagetemp/file/vusalopolixod.pdfIn PDF document text
- https://bakotech.at/uploads/ckeditor/files/retigukagoropozepo.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecad51fee8---44950903142.pdfIn PDF document text
- http://generaltubi.com/container/ckfiles/files/gufodinu.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_off0000e0aa.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE0AA | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f8bc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF8BC | 16804 bytes |
SHA-256: ecdc8715341bd9da1c9fd1cbadff5ecb3c4ea7b8f7fa68998dfc2ab0bb2baed9 |
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font_02_sfnt_off00012496.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12496 | 11532 bytes |
SHA-256: a5e04ed6799b2c706325dc982be85db008737009e9b2d9fa2d3bebddb485142c |
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