MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to distribute further malware or conduct phishing. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9971
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://krisoc.ru/uplcv?utm_term=bubble+fins+mod+apk PDF link annotation
- http://caigeshi.com/uploadfile/file/2021091301021773499.pdfIn PDF document text
- http://perchegouet.com/ckfinder/userfiles/files/53291243446.pdfIn PDF document text
- https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/2679f93f73df20c6f43383dcf0d45c91/38802876417.pdfIn PDF document text
- http://lamorenj.com/userfiles/files/ponek.pdfIn PDF document text
- https://cissud.com/uploads/ck_editor/files/wasapanuxamunisafesoxilo.pdfIn PDF document text
- http://suriyedostlukdernegi.org/image/files/35699548723.pdfIn PDF document text
- https://hoongnau.com/upload/files/wifexara.pdfIn PDF document text
- http://caudafotografia.com/userfiles/files/97602392847.pdfIn PDF document text
- http://sweed-trans.eu/ckfinder/userfiles/files/nobeziwamowoxubopulib.pdfIn PDF document text
- https://thuaphatlaihanoi.net/uploads/files/4039068431.pdfIn PDF document text
- https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/c9h052sqb8fbu3dv3ahp13h9v8/molamesanuzaxudi.pdfIn PDF document text
- http://qwerty.pl/_data/file/77328962454.pdfIn PDF document text
- https://www.geya99.com/ckfinder/userfiles/files/16732439835.pdfIn PDF document text
- http://jun-travel.com/userfiles/file/zijopeko.pdfIn PDF document text
- http://4seasonstours.in/userfiles/file/bumitomono.pdfIn PDF document text
- http://greddy.com/admin/common/ckfinder/userfiles/File/73028592058.pdfIn PDF document text
- http://bebelino.ru/userfiles/file/lojazofepepuk.pdfIn PDF document text
- https://angem.fr/userfiles/file/81682640754.pdfIn PDF document text
- http://mylodge-naoshima.com/images/blog/file/57625566455.pdfIn PDF document text
- http://cyc.cz/pictures/clanky/files/30018918724.pdfIn PDF document text
- http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7dc86582b---62131885692.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_off0000bef5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBEF5 | 10844 bytes |
SHA-256: f27978b289e1b4ae941ba2268d3df7e7ff871e0f464dcb78357fb577905920b0 |
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font_01_sfnt_off0000d7ba.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD7BA | 17720 bytes |
SHA-256: 6442259c1a238cef46e6a7d8f3c9dfee273f5f49a695a8b3abff40c8e08c91eb |
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font_02_sfnt_off000105e7.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x105E7 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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