MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample is a PDF file identified as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The embedded JavaScript and the nature of the URLs suggest an attempt to redirect the user to malicious sites or download further payloads.
Machine Learning
- Nyx PDF Classifier malicious score 0.9982
Heuristics 7
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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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Embedded JS stream low PDF_JSPDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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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=vivavideo+apk+mod PDF link annotation
- http://twfindia.in/userfiles/files/pazufoluzapiw.pdfIn PDF document text
- http://kawana.tech/userfiles/file/vegagoparufo.pdfIn PDF document text
- http://chonburi33.com/userfiles/file/16401751594.pdfIn PDF document text
- http://dtyxbpzx.com/filespath/files/20210902154418.pdfIn PDF document text
- https://egyptsuntours.com/userfiles/files/mokelu.pdfIn PDF document text
- http://happyhanool.com/ckupload/files/xowejavufoduwagoxib.pdfIn PDF document text
- https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e67762dce5---40054182045.pdfIn PDF document text
- http://riskhedgetech.com/uploaded/file/151204421761328c52d457a.pdfIn PDF document text
- http://metabolizmusonline.hu/images/upload/file/xijud.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613030976c402---zakawuxadoxubifenuzudu.pdfIn PDF document text
- https://augsburger-dartliga.de/uploads/file/roxusujakamite.pdfIn PDF document text
- https://workinhotel.com/upload/fckfile/3169188051.pdfIn PDF document text
- http://cocoal.com/uploads/file/xerolevafavitofavabix.pdfIn PDF document text
- https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/somudom.pdfIn PDF document text
- http://shtaket46.ru/page_edit/_samples/userfiles/files/fadesovisi.pdfIn PDF document text
- https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/5339428d4dcd9108256f5b1a061af351/wuduvoxizejuva.pdfIn PDF document text
- https://pindimana.in/uploads/file/9581322683.pdfIn PDF document text
- http://ghalemdi.com/userfiles/file/wezen.pdfIn PDF document text
- http://arniestribu.com/campannas/file/34944732033.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eaa3664a2b---57118480331.pdfIn PDF document text
- http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/lelivot.pdfIn PDF document text
- http://sun-apartments.pl/data/pages/95720998816.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_off0000b000.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xB000 | 14396 bytes |
SHA-256: 50276d671fcae8701e42e9578b337c4934387747c557b4d7699a0d8812ad15a7 |
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font_01_sfnt_off0000d3b5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD3B5 | 10164 bytes |
SHA-256: b62849a026006ba5eadb8d87c560a889c98af8f8ed00620c17f479cdf7f52ae2 |
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font_02_sfnt_off0000ea71.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEA71 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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