MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file identified as malicious by ML classifiers and ClamAV. It contains numerous links to external websites, many of which appear to be compromised or disposable hosting, suggesting a phishing or link farm attack. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a tactic to distribute malicious content or phish users. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious classification.
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=family+members+exercises+worksheets+pdf PDF link annotation
- http://gz-chengeng.com/uploadfile/files/zedozo.pdfIn PDF document text
- http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160784fbf4bf9f---28354037792.pdfIn PDF document text
- https://portalbime.com/UploadedFiles/New/file/27500541762.pdfIn PDF document text
- https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/fudifevigasosomutofij.pdfIn PDF document text
- http://hoadon-dientu.net/images/files/nadexamiwoserugivowebi.pdfIn PDF document text
- http://andrelandberg.com/userfiles/file/44645713632.pdfIn PDF document text
- http://mtjjt.com/2013/upload/article/files/2108190245526802018h321.pdfIn PDF document text
- http://dilimkebab.com/userfiles/file/7308647487.pdfIn PDF document text
- http://allivecoat.com/userData/board/file/2604948338.pdfIn PDF document text
- http://global-insurance-broker.de/downloads/25691656526.pdfIn PDF document text
- https://www.sexualaufklaerung-schule.ch/ck/ckfinder/userfiles/files/9027150027.pdfIn PDF document text
- https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/de42fab21ad05bf2f7b9cc41e4ad02a7/77353749190.pdfIn PDF document text
- https://inncredel.com/uploads/52163647799.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607afbf76735d---23644688679.pdfIn PDF document text
- https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aad134b91a3---16170877209.pdfIn PDF document text
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0727b35396---72081401747.pdfIn PDF document text
- https://tonwen.org/userfiles/file/34892754391.pdfIn PDF document text
- https://fibaquitaine.fr/cebatrama/userfiles/files/vawofo.pdfIn PDF document text
- http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea74488e03---nudujowa.pdfIn PDF document text
- https://alternativecarrepair.com/userfiles/file/17910041352.pdfIn PDF document text
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b89c94b46---46714160611.pdfIn PDF document text
- https://hgindustrial.eu/userfiles/files/gorabizezekajujumogeb.pdfIn PDF document text
- http://bielle-srl.com/userfiles/files/duwukanoponewi.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/6c9e707bf34d783e028dcfd5c9089e32/xowupufobuxikolas.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_off0000b4be.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB4BE | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000ccd5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xCCD5 | 11292 bytes |
SHA-256: 7fc6e83d65ac4b5a22430d817028f07d1053fa0e4ff192117926765fc1f67eeb |
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font_02_sfnt_off0000e735.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE735 | 14356 bytes |
SHA-256: f519fa2b60ba641cec6a097320ed80433bde4d1835b7cc36ebe3eb2acfbcfeb6 |
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