MALICIOUS
194
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a link farm designed to redirect users to potentially harmful sites. The heuristic findings indicate a large number of external links, many hosted on disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs, such as the one pointing to 'krisoc.ru', are likely part of this malicious infrastructure.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 7
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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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Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTONDocument contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
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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/pbw?utm_term=decrease+pdf+size+to+200kb PDF link annotation
- https://pozitolize.weebly.com/uploads/1/3/4/3/134330731/naruboma.pdfIn PDF document text
- https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/3060278.pdfIn PDF document text
- https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/0a65c3b3b356.pdfIn PDF document text
- https://leludexubivavij.weebly.com/uploads/1/3/1/8/131860378/7520933.pdfIn PDF document text
- https://kemizanina.weebly.com/uploads/1/3/0/7/130738765/xiwezelokozanepak.pdfIn PDF document text
- https://lusugola.weebly.com/uploads/1/3/4/5/134599647/tibareligaderigak.pdfIn PDF document text
- https://malekijewa.weebly.com/uploads/1/3/0/8/130813883/4896862.pdfIn PDF document text
- https://gudesikoz.weebly.com/uploads/1/3/4/3/134374550/1c9f15a4.pdfIn PDF document text
- https://lokejarezuwomi.weebly.com/uploads/1/3/0/7/130776656/4047802.pdfIn PDF document text
- https://tudiputowol.weebly.com/uploads/1/3/1/4/131452732/wugebugep_jelagu_laguv_gemimevud.pdfIn PDF document text
- https://kovibokasekur.weebly.com/uploads/1/3/4/8/134880184/2906671.pdfIn PDF document text
- https://nigepopevoxi.weebly.com/uploads/1/3/4/8/134881291/pedimuvezosip-kilezoj.pdfIn PDF document text
- https://fevenegor.weebly.com/uploads/1/3/1/3/131380973/kovolalagar-mukajonaxisu-sisujuvolikazi.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/03b6b9c4-0746-4dfb-92f1-5a1d6b58e1c0/robert_graves_greek_myths_audiobook.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/49a7ce02-f40b-47e4-a134-913df2cd273d/preventive_maintenance_checklist_format.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ae9ab989-c270-4e56-8f03-91e090bcfa90/the_sandman_tv_series_release_date.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7e1c9dbc-0afa-4ebf-b905-1f5efeed6c85/nursing_diagnosis_examples_for_pain.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/b4781cc3-f20b-45ab-99c8-9215daef73ac/1578941997.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/bb43a000-d662-4c1c-98c8-98c7c20f2ec2/gisimukisuw.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/0b2d94bd-4823-4d40-873c-ee8b7a63565d/what_is_the_strongest_intermolecular_force_present_in_h2o.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://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_off0000dd55.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xDD55 | 5644 bytes |
SHA-256: edbcaf3edf8babc103d622efd806e73caf18222b4d62bb9b2fe70f9e2ae874af |
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font_01_sfnt_off0000f0a3.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF0A3 | 10960 bytes |
SHA-256: 6e51fc694c399c22d9a773a7ef0b149c69116f98c8c674d99b1b15f10bd67d93 |
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