MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to multiple domains, some of which appear to be compromised CMS uploads or hosted on disposable infrastructure. The presence of 'utm_term' parameters suggests a phishing or SEO-based lure to drive traffic to these external sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.
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://synerhu.ru/uplcv?utm_term=linux+para+android+descargar PDF link annotation
- https://www.mediawerf.nl/bundles/store24backoffice/ckfinder/userfiles/files/katozetizafo.pdfIn PDF document text
- https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/e8mq0nd75j4c5hsf0ib4jherbp/rijug.pdfIn PDF document text
- http://cinstech-inspect-survey.com/fckeditor_userfiles/file/63563747006.pdfIn PDF document text
- https://rjpexport.com/files/katurirof.pdfIn PDF document text
- http://abwessex.com/uploads/files/saxajajabozadopokuze.pdfIn PDF document text
- http://opt-russtd.ru/data_center/upload_pictures/file/67343040368.pdfIn PDF document text
- https://mabuksusu.com/contents/files/94501519002.pdfIn PDF document text
- https://www.bevillelecomte.ovh/ckfinder/userfiles/files/1539824573.pdfIn PDF document text
- https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/89145466940.pdfIn PDF document text
- https://piphoto.tw/uploads/files/202109080136537147.pdfIn PDF document text
- https://www.edm-medical.net/ckfinder/userfiles/files/dutizaxet.pdfIn PDF document text
- https://serviceservice.eu/userfiles/file/badubosibavakasejibit.pdfIn PDF document text
- http://japhina.com/upload/file/49166223057.pdfIn PDF document text
- https://silverbirdmarketing.com/pages/images/file/tukefanetilusolur.pdfIn PDF document text
- https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135bffc82946---30344176215.pdfIn PDF document text
- https://terracetemayonetim.com/upload/ckfinder/files/19351026949.pdfIn PDF document text
- http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16140c88f8f040---vulegakapozirenivas.pdfIn PDF document text
- http://www.motionmantra.com/userfiles/files/93905145500.pdfIn PDF document text
- http://szentdorottyapatika.hu/files/rizivomeligapopav.pdfIn PDF document text
- https://baobiachau.com/luutru/files/supijame.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_off000102f1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x102F1 | 18652 bytes |
SHA-256: defcbdf7f078ac05392f9a3f89bdc6d2b4b15a0c610acfbc9dbb94c90c0ddff7 |
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font_01_sfnt_off0001325b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1325B | 10704 bytes |
SHA-256: b5697d8772c95e0847f614d3b659940caa4e318e202bfad780a341aec4c3e715 |
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font_02_sfnt_off00014acb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14ACB | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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