MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF document contains a large number of external links, identified as a link farm. The primary URL, https://jacksth.ru/award?keyword=asthma+control+test+score+pdf, suggests a lure related to health information, likely to trick users into clicking through to malicious or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with a phishing or SEO spam campaign.
Machine Learning
- Nyx PDF Classifier malicious score 0.9993
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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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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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://jacksth.ru/award?keyword=asthma+control+test+score+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4445573/normal_60571b8785ffc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4383165/normal_6013853d178e8.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4381294/normal_600c61c3bb6d5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4388620/normal_600f7e6020089.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4495681/normal_604ca12a05b22.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4425728/normal_601b8b06dd0c3.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4367622/normal_600aad3c89750.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4530910/normal_5fd66e054ff57.pdfIn PDF document text
- https://vesumuzuvof.weebly.com/uploads/1/3/4/6/134685641/17b91994a.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4406169/normal_5ffdc9688839c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4450636/normal_6049a4554fd6e.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_a79ba305f51a4c6688cd8520a8efa011.pdf?index=trueIn PDF document text
- https://7e62deb9-9b1a-4e2d-8b60-9a8f762ee201.filesusr.com/ugd/1f553f_75a73d2dcaff4c419ee701de8eee5bd8.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/robumuduluwise/26020289287.pdfIn PDF document text
- https://c11ab09e-384c-4904-8c79-5ef6f38008df.filesusr.com/ugd/7131a6_79654eee82d64889b8244638a5b7fb10.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0c2c637e-a21d-4133-9bca-51c11e04329b/duparubupazopajomo.pdfIn PDF document text
- https://s3.amazonaws.com/gebukil/41145423704.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/3532d9f6-56fd-4d3e-b7be-e549a3d33265/leading_change_chapter_7_summary.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fab859da-d1f2-4954-8242-3fc1642d9d4f/how_to_change_my_voicemail_message_on_my_verizon_phone.pdfIn PDF document text
- https://s3.amazonaws.com/rogugagatuf/foamglas_data_sheet.pdfIn PDF document text
- https://s3.amazonaws.com/dotivaf/6707601697.pdfIn PDF document text
- https://ff743420-c5e2-4527-a456-70ddb2a1abd8.filesusr.com/ugd/5178f2_1bf6ca47d02e4ee8a7eff3baa6ba0e13.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/0f74281b-67d0-4ee8-a025-3d746a8b7d1b/95554895495.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://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_off0000e520.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE520 | 5384 bytes |
SHA-256: c23a34f04239a7d9f0faaa8b26a2914ff8771c61d9afa3745c4f41c35dee79e4 |
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font_01_sfnt_off0000f744.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF744 | 10452 bytes |
SHA-256: 1d62a8ab729ec9c4927169ec5eb5359ac1b1e4736d1bbf10e5e4a3ce1cd581cc |
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