MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign, likely initiated via spearphishing.
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://vilenefex.ru/123?utm_term=functional+specification+template+design PDF link annotation
- https://cdn.sqhk.co/wudawagirus/5rjbGhr/volatozugerujetuf.pdfIn PDF document text
- https://cdn.sqhk.co/lesebonun/iSha158/96071179939.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404987/normal_602212f900f49.pdfIn PDF document text
- https://cdn.sqhk.co/jomutepe/QhwShfa/national_test_abhyas_pc.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4408184/normal_603d6f41a30c7.pdfIn PDF document text
- http://kebakef.iblogger.org/73761689453.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://tutujuk.epizy.com/tutorial_vba_excel_2013.pdfIn PDF document text
- https://01477de9-116b-42a6-a62c-54244336611e.filesusr.com/ugd/dea9e9_cb98650e84f64fc282a0bad61155ac33.pdf?index=trueIn PDF document text
- https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_a353ec8614a94c989dca98cbad04713d.pdf?index=trueIn PDF document text
- https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_1908520922504257a705d4eb71a10426.pdf?index=trueIn PDF document text
- https://e29f0852-aa8c-4fc4-a5db-fcd144ab7086.filesusr.com/ugd/b730be_3360dd655763426387025d1cde8d95f9.pdf?index=trueIn PDF document text
- http://jefevuxivux.epizy.com/bavabuxubebirufitovo.pdfIn PDF document text
- https://7dad073a-5858-4d13-bf35-a645d3acb044.filesusr.com/ugd/71e439_3bb1155f8b79495c9fa19da2e4b32b81.pdf?index=trueIn PDF document text
- https://316b94d8-f1eb-4552-9621-e6dada6029ed.filesusr.com/ugd/4b675a_6ca2566e10d6412ebff5bd1f9615d68a.pdf?index=trueIn PDF document text
- https://c6b89c2f-dc7d-490d-a648-077c51828da9.filesusr.com/ugd/29ab01_380957b67f0b4bdfb1b204c0c9bbef29.pdf?index=trueIn PDF document text
- https://8d94caac-80d5-4f6d-a73a-04ed47837dc1.filesusr.com/ugd/585b1d_6d65a5b0fe9649d09867cba23afedaf8.pdf?index=trueIn PDF document text
- https://ca39a19f-16f9-469f-ab0b-65ec0463b8d0.filesusr.com/ugd/cc9b97_e0e792a8bfc6477e890c4725d4439221.pdf?index=trueIn PDF document text
- https://a80c0318-1640-4d50-a016-df037fc402b9.filesusr.com/ugd/895bef_f1b40061d2524208ad6c3eacb0ac25cd.pdf?index=trueIn PDF document text
- http://kumugirenukelil.epizy.com/70773915852.pdfIn PDF document text
- https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_35d4ca2032b942b9a5228f7981f74ec3.pdf?index=trueIn PDF document text
- https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_364d13de18be44c88c36e8f0b18068ad.pdf?index=trueIn PDF document text
- https://13a7c488-548c-4b48-b567-d2b0b9a3e1de.filesusr.com/ugd/85d67f_4dd7d6eca1414c77b40bd9aa07ad7dda.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_off0000edff.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEDFF | 5332 bytes |
SHA-256: 512395a9440ec96467e516afd84ac247b26e3f8102ac6562fe560ac50430ffd2 |
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font_01_sfnt_off0001001c.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1001C | 10488 bytes |
SHA-256: 967e135d06b5f374d95c6d64f736ec37aba114daad1031450bcf8b6d9b78cdb2 |
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