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 SEO poisoning tactic. One prominent URL, 'https://jumiwimov.ru/award?keyword=reading+and+writing+skills+curriculum+guide+pdf+deped', is presented as a curriculum guide, likely a lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the attack.
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://jumiwimov.ru/award?keyword=reading+and+writing+skills+curriculum+guide+pdf+deped PDF link annotation
- https://cdn-cms.f-static.net/uploads/4421473/normal_6034d228d2815.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4379045/normal_604f1f86327d9.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4374859/normal_604d32a46567e.pdfIn PDF document text
- https://cdn.sqhk.co/vufuvevu/iKD5Egi/knock_someone_s_socks_off_meaning_in_english.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4444095/normal_5fdb7fc5040ba.pdfIn PDF document text
- https://cdn.sqhk.co/lebapivi/0Xig6hj/mimpi_hamil_muda_padahal_belum_menikah.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/cdd381a2-f94c-4edd-a4b0-9b6e6aa218c2/how_many_polar_bears_are_left_in_captivity.pdfIn PDF document text
- https://6ddb26ad-aa8e-4a3e-a925-5cef6fc035e1.filesusr.com/ugd/d3d820_69b9496869d344458828f9843360edc1.pdf?index=trueIn PDF document text
- https://5c126656-fc4f-473b-8c99-11744d2e1b96.filesusr.com/ugd/abd8ec_1ed65314253e4fe6952ea3392be6ef32.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/9b214910-585c-4d3b-bdcd-d9baa982d77a/xefej.pdfIn PDF document text
- https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_04c837bd337e458f98f30e5ee02d99a9.pdf?index=trueIn PDF document text
- https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_0b37aaefadb24e31b65d07ed08d3f03b.pdf?index=trueIn PDF document text
- https://4993f9ff-345c-4c03-a8ec-d4f8dac664d6.filesusr.com/ugd/debbe1_33c23c338b164aec9696e93353d4ac3c.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/c6a074d2-8eff-4b11-8b21-917f467f9425/73097999347.pdfIn PDF document text
- https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_b394bfc37ae143049d34ae1e9758c9f5.pdf?index=trueIn PDF document text
- https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_846695e72b1d4f65b7bfb84f08aaf7a6.pdf?index=trueIn PDF document text
- https://b2f3f1fb-4f3f-4d5d-be65-f5b10dce6288.filesusr.com/ugd/735189_291cefbd73934137bc747c8ba748906e.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_off0001442b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1442B | 5640 bytes |
SHA-256: 5d5ea900cff4d2c71555a47924ddec117a514023d7780ee654847b43091aea0d |
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font_01_sfnt_off0001576e.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1576E | 12728 bytes |
SHA-256: b40365094363db500c1975a74e6f1f46aea3c4f95fe23cddcf343d5e6d4f8d92 |
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