MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm with numerous external URIs, including one pointing to krisoc.ru. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL patterns suggest a phishing or malware distribution attempt.
Machine Learning
- Nyx PDF Classifier malicious score 0.9908
Heuristics 5
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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 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://krisoc.ru/uplcv?utm_term=watch+wonder+egg+priority+online+free PDF link annotation
- http://agcslohian.com/userfiles/file/53920445243.pdfIn PDF document text
- https://ustunbilgisayar.com/userfiles/files/16815283247.pdfIn PDF document text
- http://techscreening.com/userfiles/files/9521613197.pdfIn PDF document text
- https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/sosimufim.pdfIn PDF document text
- http://www.ctnphrae.com/ckfinder/userfiles/files/natupo.pdfIn PDF document text
- https://macauroommate.com/ckfinder/userfiles/files/53668700524.pdfIn PDF document text
- https://bibonatura.com/ckfinder/userfiles/files/miweduxifefoziv.pdfIn PDF document text
- https://www.wroclawmodelshow.pl/ckfinder/userfiles/files/99812560974.pdfIn PDF document text
- https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/patumugumufeta.pdfIn PDF document text
- https://psihodesk.ro/ckfinder/userfiles/files/80417437266.pdfIn PDF document text
- https://phm.vn/upload/files/34608629251.pdfIn PDF document text
- http://hippodrome-compiegne.fr/www/uploads/file/45590249612.pdfIn PDF document text
- http://pomodorolennep.de/gfx/userfiles/files/43893471951.pdfIn PDF document text
- http://hasicimosnov.cz/foto/Image/file/mewazepidej.pdfIn PDF document text
- http://cocoal.com/uploads/file/4508516549.pdfIn PDF document text
- https://highfieldhousehotel.net/nbloom/fckuploads/file/zodarogutimafozakajubazeg.pdfIn PDF document text
- http://gfzgt.ch/upload/file/dibupaxizizudesedip.pdfIn PDF document text
- https://openkomm.yussfone-crm.com/userfiles/file/50436617279.pdfIn PDF document text
- https://reazfarah.com/ckfinder/userfiles/files/bafos.pdfIn PDF document text
- https://matricula.netlandschool.cl/files/84841378327.pdfIn PDF document text
- https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/12048254261.pdfIn PDF document text
- https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/0f283006ecba5a5b64a57bac04dff90b/28321728048.pdfIn PDF document text
- http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/lelawiroratumo.pdfIn PDF document text
- https://oteaexpert.fr/cite_imgs/file/66645510295.pdfIn PDF document text
- http://huynhgiabaohotel.com/uploads/FCK/file/bitavilanakutiweme.pdfIn PDF document text
- http://dalnoboy.org/data/filestorage/upload/files/93275271192.pdfIn 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://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000bfe1.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xBFE1 | 10924 bytes |
SHA-256: da38a9184bed0f9c2e761ece6696c0bf46564fa3a815e796f132d8df5a5524f6 |
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font_01_sfnt_off0000d8f6.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xD8F6 | 16792 bytes |
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1 |
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font_02_sfnt_off0000f108.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF108 | 18336 bytes |
SHA-256: 78282ab49355029d19d447711d0efd8501e753a44781b5c650bed867dd9c1ef5 |
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