MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO spamming operation. One of the primary external links, 'https://zajinet.ru/award?keyword=telugu+biography+books+pdf', is likely part of this malicious infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
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://zajinet.ru/award?keyword=telugu+biography+books+pdf PDF link annotation
- https://cdn-cms.f-static.net/uploads/4393035/normal_604224221ccfb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411493/normal_5fd898d5ea422.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391302/normal_5fe3ad161451b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4471455/normal_6027e5e577dda.pdfIn PDF document text
- http://inscarusa.info/5441053814351c68.pdfIn PDF document text
- http://lifeshop.pro/surogewuniki5zsbt.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451369/normal_6054ea4d86d21.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470224/normal_5fd7089fca2b9.pdfIn PDF document text
- http://uber-global.com/how_to_factory_reset_alexa_echo_dot_2nd_generationpjqqt.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408343/normal_602d9f8368bf9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4419441/normal_601a1a13d43cb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4382193/normal_6014ec345613a.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://uploads.strikinglycdn.com/files/42aabc74-5c15-4691-b014-4a2f3801c979/50760667190.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/33e21494-6bb8-465f-951b-ea2c5c8d5192/the_chaser_movie_online_with_english_subtitles.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f4b6501c-e96f-4947-bf60-5f2dfc079173/polaroid_sx_70_sonar_autofocus_manual.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6f653b55-caa0-4205-9f71-1fa945be1325/is_vicks_humidifier_good_for_babies.pdfIn PDF document text
- https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_cfdaacb65ec84e3e99c05416440f1a01.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/d55265d7-9b3c-4e5c-b3d8-641b321989fd/how_to_calculate_for_percentile_rank.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8b506180-46c4-4922-82fd-5e17abe376a7/is_lifestraw_effective.pdfIn PDF document text
- https://9c3086b9-336b-4a4d-b39c-975a2563a2e0.filesusr.com/ugd/f4f792_f3ddc52ec6164c7f9cd1e30967d2c35c.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 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000d1e2.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD1E2 | 5560 bytes |
SHA-256: fe2e6fa60317816b0875b71c5a00dffb6938d35ea3e76493be8b4f82f29616cf |
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font_01_sfnt_off0000e4c5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xE4C5 | 36828 bytes |
SHA-256: 5f686e51f7856e400dd75c65b256dd3b152ae5e19700520f6e93b713fc8508ae |
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font_02_sfnt_off00012f2e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12F2E | 10100 bytes |
SHA-256: 1ce582548ab556c0ec451450ae23022d6f6497f98b2e29b2b9ed376591606c9c |
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