MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some hosted on compromised CMS platforms. The presence of numerous URLs, many with 'utm_term' parameters, suggests an attempt to direct users to potentially malicious content or phishing pages.
Machine Learning
- Nyx PDF Classifier malicious score 0.9953
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=send+email+on+button+click PDF link annotation
- http://tao-oita.com/admin/upload_filesfile/33828556802.pdfIn PDF document text
- http://yogaschoolofkerala.com/photos/editor/files/kekibuk.pdfIn PDF document text
- https://associazionedynamica.it/uploads/file/42192830974.pdfIn PDF document text
- http://fsgzb.com/upfolder/e/files/20210906203013.pdfIn PDF document text
- https://temahr.hr/files/bubomedurufu.pdfIn PDF document text
- http://limobebe.com/userfiles/files/3369476125.pdfIn PDF document text
- http://quaint-house.com/images/blog/file/87097499695.pdfIn PDF document text
- http://msslink.ru/userfiles/files/bapisanivit.pdfIn PDF document text
- http://elandtour.com/FileData/ckfinder/files/20210902_ABD9AB3E756CCE1E.pdfIn PDF document text
- https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/f2vbuerbgpdo06a3eanibucqie/10674513425.pdfIn PDF document text
- http://hoanggiaphatland.com/uploads/image/files/zimaxutudor.pdfIn PDF document text
- http://sambometal.com/dataroom/file/vaxemaduzomisu.pdfIn PDF document text
- https://unitytradefze.com/ckfinder/userfiles/files/93058123643.pdfIn PDF document text
- https://lombardpruszkow.pl/local/userfiles/file/xajisuboz.pdfIn PDF document text
- https://west-holding.com/userfiles/file/72446918255.pdfIn PDF document text
- http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44743851204.pdfIn PDF document text
- https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5b2fd0996---vurorufiwizo.pdfIn PDF document text
- http://kerekesvillszer.hu/UserFiles/file/56724262937.pdfIn PDF document text
- https://www.ftha.org/admin/ckfinder/userfiles/files/42934087662.pdfIn PDF document text
- http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/mimijozinazoliwulutegif.pdfIn PDF document text
- http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161399a05ceac1---maxevakonibezanikogufegus.pdfIn PDF document text
- http://www.ferm-matic.fr/upload/file/lororijodiwefaxasaxa.pdfIn PDF document text
- https://apc-algercentre.dz/ckfinder/userfiles/files/nixenonezami.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_off0000be06.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBE06 | 10672 bytes |
SHA-256: 605c667d22c169c0fabd07cddc65aac314fa9c81fd6435808c465ca659118e37 |
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font_01_sfnt_off0000d677.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD677 | 16792 bytes |
SHA-256: bc419a152545e3a466f58f5319a26c89cbbe28e9af3449995a75ff405a04309c |
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font_02_sfnt_off000101fe.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x101FE | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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