MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9951
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=gerund+infinitive+exercises+pdf PDF link annotation
- http://asu78.ru/userfiles/file/1165219295.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/43abfea9df16cc49ed69bb21b5751fc9/gisikiwagek.pdfIn PDF document text
- http://chromowane.com/userfiles/file/54374581426.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c9c2f60e1d---18311639928.pdfIn PDF document text
- https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd76c0fe32---83774026163.pdfIn PDF document text
- https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139ea8958aa0---medirufivixe.pdfIn PDF document text
- http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c88be881c8---99730041731.pdfIn PDF document text
- https://nbretail.com.vn/ckfinder/userfiles/files/49904395666.pdfIn PDF document text
- http://way-of-spirit.ru/upload/file/11331623036.pdfIn PDF document text
- http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161300d1519c18---92217072405.pdfIn PDF document text
- http://usefchina.com/uploadfile/file///2021090713151479.pdfIn PDF document text
- http://zoop-tech.com/ckfinder/userfiles/files/gelima.pdfIn PDF document text
- https://successalpha.team/upload/files/jewapukoneribufimapab.pdfIn PDF document text
- http://ultrabeauty-ff.ru/userfiles/file/dumilikabiduvipumekobekoj.pdfIn PDF document text
- https://giaphutelecom.com/tctt/sites/aaa/file/61842978694.pdfIn PDF document text
- https://ijaetis.org/ckfinder/userfiles/files/negivujabejunizobabo.pdfIn PDF document text
- https://85097781.com/upload/files/56731296710.pdfIn PDF document text
- http://interwork.sk/userfiles/file/46253651702.pdfIn PDF document text
- http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134a0a75fb6c---boretolaboxuz.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/161327f841a929---70185766699.pdfIn PDF document text
- http://tainanrup.longi.tw/uploadfiles/files/20210909_070907_8965.pdfIn PDF document text
- http://tk-weld.com/images/library/File/lakeson.pdfIn PDF document text
- https://akproauto.net/nbloom/fckuploads/file/40285646756.pdfIn PDF document text
- https://brawlcall.com/ckfinder/userfiles/files/watudopuwan.pdfIn PDF document text
- http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/39527372741.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_off0000e39e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE39E | 10592 bytes |
SHA-256: e180f96d55737ecf0d0d434a43786f79f086b15f5acb53dc1767c006e5b83562 |
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font_01_sfnt_off0000fbf7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFBF7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00011409.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x11409 | 17760 bytes |
SHA-256: 716de1a7f02ada4eca69ed0b25bb97090228bc3950bdeb3cfe5d8ebfe6600b42 |
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