MALICIOUS
186
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1204.002 Malicious Link
The PDF file was identified as malicious by a machine learning classifier and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, containing numerous external links to other PDF files hosted on various domains, some of which are identified as disposable. The primary URL, 'https://medvor.ru/pbw?utm_term=chemistry+scientific+notation+worksheet', suggests a potential lure related to educational content, which is then used to redirect users to a network of other malicious PDFs.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
Heuristics 6
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ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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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://medvor.ru/pbw?utm_term=chemistry+scientific+notation+worksheet PDF link annotation
- https://cdn-cms.f-static.net/uploads/4384831/normal_60be28cbb9dd6.pdfIn PDF document text
- https://fudonorovivur.weebly.com/uploads/1/3/4/6/134665028/605433.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4447278/normal_60155663e2700.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4476946/normal_5fc75c47338d2.pdfIn PDF document text
- https://vuxomikum.weebly.com/uploads/1/3/4/5/134587944/1233991.pdfIn PDF document text
- https://powufekati.weebly.com/uploads/1/3/4/0/134012492/6214833.pdfIn PDF document text
- https://vadinako.weebly.com/uploads/1/3/4/8/134893839/7232a97e3.pdfIn PDF document text
- https://lafirepekawaxa.weebly.com/uploads/1/3/4/7/134760561/afbf4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4475570/normal_5ff8aa0f63301.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4380226/normal_5ffe648447625.pdfIn PDF document text
- https://mumizajasaliso.weebly.com/uploads/1/3/4/5/134598274/1335442.pdfIn PDF document text
- https://gajinuware.weebly.com/uploads/1/3/4/5/134597963/marofifixumif.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4374843/normal_5fcf51afac2b4.pdfIn PDF document text
- https://bowefolezoz.weebly.com/uploads/1/3/1/4/131407704/zuvudusopolaviju.pdfIn PDF document text
- https://falojaba.weebly.com/uploads/1/3/0/7/130776150/9cd04.pdfIn PDF document text
- https://rezisepadas.weebly.com/uploads/1/3/4/2/134235668/dd462361.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369647/normal_60406fdbce449.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4370080/normal_6014198d4492c.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4452389/normal_600fbda85b5e2.pdfIn PDF document text
- https://pasudavekeri.weebly.com/uploads/1/3/1/4/131437626/ximovizis.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409619/normal_60256d6956915.pdfIn PDF document text
- https://josubolifixit.weebly.com/uploads/1/3/5/4/135400154/1059357.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000de54.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDE54 | 5252 bytes |
SHA-256: 2255c3ef689174f04dd8d258cf8f9cc001b34918c8721306691c2576a0c2902c |
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font_01_sfnt_off0000f01a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF01A | 10296 bytes |
SHA-256: 25a89f00cee53293056be085b9d637189ce7a79f9caee10e0ed05e167a08f1f2 |
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