MALICIOUS
226
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spam campaign. The presence of an invisible link to 'securityofusersdevicesonline.site' indicates a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly support its malicious nature, likely as a phishing lure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 7
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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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Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LUREPDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
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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://botokaw.ru/strik?utm_term=composition+of+trig+functions+and+their+inverses PDF link annotation
- https://cdn-cms.f-static.net/uploads/4408599/normal_6028357768226.pdfIn PDF document text
- https://cdn.sqhk.co/dewufidabo/sHJHhjb/55846848490.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420025/normal_5fea01ae3798f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408483/normal_6029990c48e13.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4401983/normal_5fd90d0dccef8.pdfIn PDF document text
- http://securityofusersdevicesonline.site/aqa_gcse_biology_book_answersygzyt.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4372681/normal_6018efa149dc9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4448103/normal_602aae5988794.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369190/normal_60041c082e42b.pdfIn PDF document text
- https://cdn.sqhk.co/vimewiki/heQqhhi/card_crushers_multiplayer_monster_battle_tcg.pdfIn PDF document text
- https://waforavorodi.weebly.com/uploads/1/3/4/3/134314120/liwiren.pdfIn PDF document text
- https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/saragoxepesufosuk.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379035/normal_5fda6b5c13c81.pdfIn PDF document text
- http://trastqort.online/xotodabofaba0o6o.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4371523/normal_60364a89437fa.pdfIn PDF document text
- http://fherixq.com/love_to_draw_manga_gacha_life52fta.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_5ba6de080c0445a88229c5dc795cb161.pdf?index=trueIn PDF document text
- https://7aff118d-26f6-4d76-9bc9-1838009e7274.filesusr.com/ugd/f80014_67d9e2f0250742c28327d8e53f3c18a9.pdf?index=trueIn PDF document text
- https://ec2d952e-5494-46d8-b841-fee222248b17.filesusr.com/ugd/9713d5_37309868d5234041a30e4bc6c69704f9.pdf?index=trueIn PDF document text
- https://af0fe010-594a-4ec7-a26b-e2d78e33490d.filesusr.com/ugd/7d2910_07f41d3e8df14124bed4a1dc3530506a.pdf?index=trueIn PDF document text
- https://ee60c613-3dd1-430d-b711-08e3dcbf0273.filesusr.com/ugd/19ce5d_9c1cce232c40405f8d2f7bfe97ed78ff.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_off0000dfeb.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDFEB | 5504 bytes |
SHA-256: 0f11d46cecf88ee959efe110fd192951a7c372ff0c0c407260fad25796449f8f |
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font_01_sfnt_off0000f27b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF27B | 10956 bytes |
SHA-256: 14015f4e31ddaefd9fad7b47034d4995afafe858b21813e235833a4aa950c357 |
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