MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF contains numerous links to external resources, many hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a trojan. The presence of embedded URLs and link farms points towards an attempt to redirect users to malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9995
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://chcial.ru/uplcv?utm_term=software+development+life+cycle+pdf+download PDF link annotation
- http://pekingtogo.com/uploads/files/26859571359.pdfIn PDF document text
- https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6e54c31191baea98d84990b167317803/bepasofobotafoxu.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/latalokefi.pdfIn PDF document text
- http://www.manorbymajor.com/userfiles/files/14182635645.pdfIn PDF document text
- https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/39a4c0c32b270bd847be0e7cb1990bbb/89203465707.pdfIn PDF document text
- http://michelschuurmans.nl/images/uploads/file/mojejibam.pdfIn PDF document text
- http://diplomat2014.ru/ckfinder/userfiles/files/82752985746.pdfIn PDF document text
- http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160849394e7384---sefuza.pdfIn PDF document text
- https://ldcpc.com/ckfinder/userfiles/files/45177200654.pdfIn PDF document text
- https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/a1444o7k566gih3bu03hghcq2d/16328557573.pdfIn PDF document text
- http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608433ea17b9b---7349620341.pdfIn PDF document text
- https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/81338207320.pdfIn PDF document text
- http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609c71e610dd9---bazuvevivezupaja.pdfIn PDF document text
- https://alarouba.com/ckfinder/userfiles/files/85401984542.pdfIn PDF document text
- http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160706ba44ecd3---radotewokamisiwenirori.pdfIn PDF document text
- https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3be4f5655a---24451313022.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_off00010f6b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x10F6B | 18732 bytes |
SHA-256: 6af8cf14dcfce83df2cf24a78c7f7e5b8509932b637a17d5468088cb7c06f2ec |
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font_01_sfnt_off00014129.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x14129 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off00015940.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x15940 | 10952 bytes |
SHA-256: 29b76e5a039fa7c06df4263255287329216b5ef2eccfa2e1415777f606986cb4 |
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