MALICIOUS
156
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to PDF files hosted on various platforms, suggesting a link farm or distribution mechanism. The primary URL, 'https://kuzutuzo.ru/strik?utm_term=letters+from+rifka+full+book+pdf', indicates a lure related to book content, likely to deceive users into visiting malicious sites or downloading further payloads. No scripts were extracted, but the PDF structure and extensive external links strongly suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9994
Heuristics 5
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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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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://kuzutuzo.ru/strik?utm_term=letters+from+rifka+full+book+pdf PDF link annotation
- https://static.s123-cdn-static.com/uploads/4482002/normal_5fed52e64a7e4.pdfIn PDF document text
- https://vetidemilutuzu.weebly.com/uploads/1/3/4/4/134492936/333a1f1791d3.pdfIn PDF document text
- https://gokokunebede.weebly.com/uploads/1/3/0/8/130874183/9819275.pdfIn PDF document text
- https://nugezufetewivu.weebly.com/uploads/1/3/4/5/134598593/6682774.pdfIn PDF document text
- https://sidatotivokusud.weebly.com/uploads/1/3/5/9/135959985/romijerisa.pdfIn PDF document text
- https://keminugugenoxag.weebly.com/uploads/1/3/4/3/134321568/e387ab4ad.pdfIn PDF document text
- https://fowowudajij.weebly.com/uploads/1/3/5/3/135312379/sufukiv-bitefowitenir-bojoxaralemusim-tuvupetewujedex.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4462339/normal_5fe5ebba5b301.pdfIn PDF document text
- https://guvikaki.weebly.com/uploads/1/3/4/5/134519546/775da6da13.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4423171/normal_6003e995e247b.pdfIn PDF document text
- https://rigavedisibabaz.weebly.com/uploads/1/3/4/9/134902328/837720.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413110/normal_6060fa03de0fb.pdfIn PDF document text
- https://ginegumogigoxi.weebly.com/uploads/1/3/2/8/132816185/foxolosabubuvivu.pdfIn PDF document text
- https://xukokamil.weebly.com/uploads/1/3/4/3/134317204/1399466.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369663/normal_606da09c9e66b.pdfIn PDF document text
- https://losasogewago.weebly.com/uploads/1/3/1/4/131437886/3034700.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4486037/normal_60172d19280a2.pdfIn PDF document text
- https://nodimawajovuri.weebly.com/uploads/1/3/4/4/134431691/5141577.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4484990/normal_5fc860a01b544.pdfIn PDF document text
- https://togajakuro.weebly.com/uploads/1/3/1/4/131409127/tifuvudixe-lawifov-gaxutemuzedup-nisukokofori.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
- https://savannah.gnu.org/projects/freefont/In PDF document text
- http://www.gnu.org/licenses/In PDF document text
- http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off00013cbc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x13CBC | 9652 bytes |
SHA-256: b3cbb0e4f60306c64c6663e6d616a2c5f50d1296fc4cd55cdd3fff7abe6bb1b6 |
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font_01_sfnt_off000156fc.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x156FC | 5332 bytes |
SHA-256: 231c5d44febe7fae2a617463f90c72009469aaef92eb7f18d42da2c6fe2d32fc |
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font_02_sfnt_off00016903.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x16903 | 13652 bytes |
SHA-256: 8733e69b0fb3306a5a898bb789af22249266b12e60182899dd6e11b256a6d070 |
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font_03_sfnt_off00019572.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x19572 | 16300 bytes |
SHA-256: 36324b18f66c7dab6ac35cbf3855fe2f530c1ac6468d9ff2e84319ae6b5e0fc2 |
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