MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and links to compromised CMS uploads, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.
Machine Learning
- Nyx PDF Classifier malicious score 0.9516
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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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PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILEDThe cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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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=advanced+heat+transfer+lecture+notes+pdf PDF link annotation
- https://eletmodguru.hu/files/files/sinup.pdfIn PDF document text
- http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cfdf8f826---vudifiz.pdfIn PDF document text
- https://binarbaidtrading.com/public_html/userfiles/file/97821123018.pdfIn PDF document text
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/97dcee6d00ab688d4ee2ab34ffc128ba/41964820037.pdfIn PDF document text
- http://gayaarchi.com/userfiles/file/20210628105150.pdfIn PDF document text
- https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/ucebcea6r1qof880r448fe21rb/zusate.pdfIn PDF document text
- http://world-green-hope.com/uploads/files/2101775925.pdfIn PDF document text
- http://ramenhajimetustin.com/uploads/files/27541962655.pdfIn PDF document text
- http://boldino-hotel.com/ckfinder/userfiles/files/wejulopa.pdfIn PDF document text
- https://trvstore.com/userfiles/file/ravewexiwiguvifojedu.pdfIn PDF document text
- https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/bks0kq57p3h9j8g81tn1doac21/65826209430.pdfIn PDF document text
- https://toskov-yordanov.com/userfiles/file/32651370916.pdfIn PDF document text
- https://www.nitdgp.ac.in/uploads/userfiles/files/14680603645.pdfIn PDF document text
- http://adabaskimerkezi.com/upload/file/robasaxopidekizevales.pdfIn PDF document text
- https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160f54f3677ceb---xekevo.pdfIn PDF document text
- http://baugeraeteverleih.de/benutzerdateien/xejoza.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f426ce1f96---nosejokuparaka.pdfIn PDF document text
- http://indagosrl.it/userfiles/files/rizuradalubopabikiv.pdfIn PDF document text
- https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/7ab12520a3762027e81cb1e91d6ffe2b/40270341708.pdfIn PDF document text
- https://anfauglir.com/images/file/71045778865.pdfIn PDF document text
- http://kusadasidentalclinic.com/img/userfiles/files/batirifexokisedoputobegek.pdfIn PDF document text
- https://tmtteks.com/files/17464594121.pdfIn PDF document text
- http://stevis.cz/files/file/74575472218.pdfIn PDF document text
- https://bouveau-consulting.com/userfiles/file/60168948868.pdfIn 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_off0000f131.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF131 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off00010948.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10948 | 10772 bytes |
SHA-256: a58a604a2e059ec6ff5e3c38c93353202a01605921510054aa985be1d9571dc3 |
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font_02_sfnt_off00012215.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12215 | 19688 bytes |
SHA-256: e544f814c8ff7888d8e8c5f9c1cdfe020f2e6ed166ccc449034542f39758ba15 |
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