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. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI indicators and link farm heuristics strongly supports a phishing or malware distribution attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9988
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://krisoc.ru/uplcv?utm_term=give+me+some+head PDF link annotation
- http://mindatpeace.us/uploads/files/70189236129.pdfIn PDF document text
- https://vnmmalta.com/userfiles/file/nimibazu.pdfIn PDF document text
- http://ulv-fogger.es/d/files/finagizowijumir.pdfIn PDF document text
- https://www.vconsole.com/ckfinder/files/32459503059.pdfIn PDF document text
- https://abyway.lv/images/ck_images/files/zotefuxurafijurowuzuliri.pdfIn PDF document text
- https://ijfbacknumber.com/editor_up/72451075862.pdfIn PDF document text
- http://centrlita.ru/archive/image/file/97270984439.pdfIn PDF document text
- http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f9f2ba52eb---zijivufivivogovapijo.pdfIn PDF document text
- http://abwmercury.com/uploads/files/fadiwujisisuxisuwiniteki.pdfIn PDF document text
- https://www.andreivieru.com/ckfinder/userfiles/files/ruzunus.pdfIn PDF document text
- http://agro-vostok.ru/userfiles/file/97622687367.pdfIn PDF document text
- http://hoya889.com/upfile/files/20210928230232.pdfIn PDF document text
- http://www.dfdtrading.sk/ckfinder/userfiles/files/52382827443.pdfIn PDF document text
- http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/161450f29b0de4---87101445855.pdfIn PDF document text
- https://adtw1.com/ckfinder/userfiles/files/65967464336.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1614f84a18f609---43891065265.pdfIn PDF document text
- http://rubivina.com/Images_upload/files/diwetixobazopame.pdfIn PDF document text
- https://semagro-msw.ru/pics/images/file/29816880906.pdfIn PDF document text
- http://cuatro-pr.org/sites/default/files/file/fodizosomukipi.pdfIn PDF document text
- http://bjaimama.com/data/upload/2021/09/file/202109041838551920.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_off000100f9.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x100F9 | 19004 bytes |
SHA-256: 4b97891d47df52a88e49e3ff1130810a42655182a7af7bb38386e26d893b7031 |
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font_01_sfnt_off000131ee.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x131EE | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00014a05.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14A05 | 10272 bytes |
SHA-256: 282339be2a966f5f1f7255de25057ddf411fe38ca028bc3613673781505d0074 |
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