MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs pointing to disposable hosting and compromised CMS uploads, suggesting a link farm designed to redirect users to malicious sites. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' further supports this, indicating the PDF's primary function is to act as a lure for phishing or malware delivery.
Machine Learning
- Nyx PDF Classifier malicious score 0.9956
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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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://smidgel.ru/uplcv?utm_term=tratado+de+endocrinologia-pdf+download PDF link annotation
- http://hocikto.info/userfiles/file/judurodusetilujevebofo.pdfIn PDF document text
- http://euro520.net/userfiles/file/1625660362535520807.pdfIn PDF document text
- https://akapacha.com/userfiles/file/kinisomaxaxazafek.pdfIn PDF document text
- http://kme-kme.cz/files/file/39462084560.pdfIn PDF document text
- http://ckrestaurantgroup.com/ckfinder/userfiles/files/modenil.pdfIn PDF document text
- http://mgocsm.in/userfiles/file/39153448988.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d111dc6def---biwujenibapubefulaju.pdfIn PDF document text
- http://fullx.net/files/tefavowap.pdfIn PDF document text
- https://ruxthai-guesthouse-chiangmai.com/ckfinder/userfiles/files/pinizimodedefurofup.pdfIn PDF document text
- http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/mk8pe25sj2c69pae3fuddgq0r5/62278307245.pdfIn PDF document text
- http://pune-india.info/userfiles/file/digivabuv.pdfIn PDF document text
- https://atl-50.com/files/file/84910819006.pdfIn PDF document text
- http://staropolski.net/Upload/file/wepeluso.pdfIn PDF document text
- http://abarappresentanze.it/userfiles/files/39360954481.pdfIn PDF document text
- http://symbioticlifetech.org/attfile/fckimg/file///20210619215716_786682298.pdfIn PDF document text
- https://residenciasanamaro.es/userfiles/files/kejufebuxalupam.pdfIn PDF document text
- http://dobrasekacka.cz/userfiles/file/2989475911.pdfIn PDF document text
- http://csc0311.com/userfiles/file/20210807130018_r7pj15.pdfIn PDF document text
- http://chistogood.ru/admin/ckfinder/userfiles/files/farum.pdfIn PDF document text
- http://altelaw.com/uploads/image/file/84104647062.pdfIn PDF document text
- https://seedomoretravel.com/files/files/84747684259.pdfIn PDF document text
- http://heatherjansch.com/ckfinder/userfiles/files/tuxonar.pdfIn PDF document text
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1dfbb8403---18896938450.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_off0000df44.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDF44 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_01_sfnt_off0000f756.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF756 | 20340 bytes |
SHA-256: d748d185bdf6770b696997595db594575dd1d8c13afeaaa4df89a5715350495c |
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font_02_sfnt_off00012b5e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12B5E | 10712 bytes |
SHA-256: c5a7ce5e0f91bdb0414696f18475ea06e50f91d38e249aeab2fa799bd0887f0e |
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