MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary URL, https://midufefew.ru/award?keyword=physiology+pdf+ak+jain, is likely the initial lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
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://midufefew.ru/award?keyword=physiology+pdf+ak+jain PDF link annotation
- https://cdn-cms.f-static.net/uploads/4366047/normal_60240a5c24248.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4474977/normal_605821ae0a9d4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453747/normal_6045e67c92071.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4487186/normal_5fee6685d143b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4479446/normal_5fe78bdc856ea.pdfIn PDF document text
- https://cdn.sqhk.co/legexere/pifqFjf/16214872750.pdfIn PDF document text
- https://cdn.sqhk.co/vovewotutal/ifhiSdC/88529145452.pdfIn PDF document text
- https://cdn.sqhk.co/ravawiku/Uwvgjic/lazer_spot_inc_savannah_ga.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_39e3b97da55b47f684a1700408f057fc.pdf?index=trueIn PDF document text
- https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_3cb34f64af224b0e8109ac02d46e9676.pdf?index=trueIn PDF document text
- https://d934ed86-632c-4751-b35b-4303166f997e.filesusr.com/ugd/be0f55_3a3f452ce9864d96999f57ea00cf3a41.pdf?index=trueIn PDF document text
- https://88966db1-4a83-4446-b941-f65022a6235f.filesusr.com/ugd/928e0f_052fa8b9cc4641cf9e36ba811a972834.pdf?index=trueIn PDF document text
- https://709e7e89-b264-4d73-b757-064736ed86f1.filesusr.com/ugd/f523c3_130baf9284a546838b0bd8d9196126a4.pdf?index=trueIn PDF document text
- https://cb6d8354-940b-4e05-9f1d-0150973ab277.filesusr.com/ugd/882da0_60683957afec411890c69e50d2f8b459.pdf?index=trueIn PDF document text
- https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_4658ffe0a18f411dac41af4b4f7fd13d.pdf?index=trueIn PDF document text
- https://f07eb630-23ff-4298-a1df-d7940f1ba2dc.filesusr.com/ugd/097a5b_5e364a8ec5bc46a2b0c10c6d76a71701.pdf?index=trueIn PDF document text
- https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_aec36b7dc021450ab825c82994894877.pdf?index=trueIn PDF document text
- https://df867d32-629d-4b48-af14-2fc5df20f827.filesusr.com/ugd/287761_ef21269fd3544fb18ca0e1fa3b51249d.pdf?index=trueIn PDF document text
- http://dijilupejiba.rf.gd/wuzuvomobobobe.pdfIn PDF document text
- https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_bd54bb51c7304760b2bef95f04d2485b.pdf?index=trueIn PDF document text
- https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_029fa16058844ca1950d3370024323ca.pdf?index=trueIn PDF document text
- http://bogadigoxizalux.epizy.com/30271139420.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_off0000d499.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD499 | 5448 bytes |
SHA-256: 6bfc4f06d49df5121c311901dbb85f3187646e4989aead9ccd3dddb19910a359 |
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font_01_sfnt_off0000e73c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE73C | 11184 bytes |
SHA-256: d7f71da607fefbd486ec3f1ec135d6847e245b0f0af5c766872ce9d45b659148 |
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