MALICIOUS
244
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The sample is a PDF document that contains a large number of embedded links, many of which point to disposable hosting services. One of the extracted URLs, 'https://crophysi.ru/strik?utm_term=dark+alliance+firearms+instagram', is identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution via the link farm.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINKPDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
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Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARMSmall PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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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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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://crophysi.ru/strik?utm_term=dark+alliance+firearms+instagram In PDF document text
- https://cdn-cms.f-static.net/uploads/4481170/normal_601535b74d506.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386087/normal_6024293ba1785.pdfIn PDF document text
- http://acupofjacob.com/weber_spirit_e-330_burner_replacementwlsbb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4423453/normal_5fdf349a41a02.pdfIn PDF document text
- https://nejotadig.weebly.com/uploads/1/3/1/1/131164569/gimujisarejow-pirovuk-wotofabasavo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4494661/normal_601574e8e7274.pdfIn PDF document text
- http://tesilav.sportsontheweb.net/45305827260.pdfIn PDF document text
- https://sijudunewofas.weebly.com/uploads/1/3/4/6/134696620/ninav_vapipazo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4407807/normal_60319a761d0e9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4488339/normal_602c696821306.pdfIn PDF document text
- https://bosudire.weebly.com/uploads/1/3/4/4/134456289/seguri.pdfIn PDF document text
- http://kompledom.com/tp-link_tl-wr841nd_specificationslguu1.pdfIn PDF document text
- http://kaboliwup.mypressonline.com/chacun_sa_route_partition.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4420438/normal_5fceda8d7bba2.pdfIn PDF document text
- http://marafonsport.site/battle_royale_in_early_accesskfpi9.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_afb7309de8b1402ca208ad6dca84fb44.pdf?index=trueIn PDF document text
- https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_7caf589bda0049db875edc60f94b7118.pdf?index=trueIn PDF document text
- https://2a1457bb-a4d2-449b-8914-d784a503a6da.filesusr.com/ugd/c0fca2_7003dc08cbc64c6ba4e7b5434ec17bbd.pdf?index=trueIn PDF document text
- https://00c0516a-c822-4344-a779-6f74e039753d.filesusr.com/ugd/9e41f0_beda27ded9364d6da72c1653bfbb8a38.pdf?index=trueIn PDF document text
- https://781b76d0-895c-4d4e-90f3-491762fad171.filesusr.com/ugd/894952_cbd8d0033b414e9f92998eab83f919a5.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text
Extracted artifacts 2
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000d4e8.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD4E8 | 5264 bytes |
SHA-256: 7fac7d849c999808fbce6e81cbd84c66582e429dfd01c9b9a1ce09e5903dc35d |
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font_01_sfnt_off0000e6c5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE6C5 | 11012 bytes |
SHA-256: 83e81b921b68ea37963f1b18e02950f73bd4ffe0cf9f03cb1702ee41778c483d |
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