MALICIOUS
126
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF document contains embedded URLs that redirect to external websites, with one notable URL being https://nipisod.ru/strik. Heuristic analysis indicates the PDF is a link farm on disposable hosting, and ClamAV detected it as Pdf.Phishing.Trojan. The ML classifier also flagged it as malicious. The document body, though partially obfuscated, suggests a lure related to differentiating between viral and bacterial colds to entice users to click the malicious links.
Machine Learning
- Nyx PDF Classifier malicious score 0.9991
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 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://nipisod.ru/strik?utm_term=differentiate+between+viral+and+bacterial+cold PDF link annotation
- http://leftoutclub.com/one_punch_man_blast_es_saitamahhgrj.pdfIn PDF document text
- http://zunowugijose.22web.org/wto_agreement_on_subsidies_and_countervailing_measures.pdfIn PDF document text
- http://nizixoj.iblogger.org/luziverakunurirasatopot.pdfIn PDF document text
- http://vakekaninu.iblogger.org/google_sheets_ipad_freeze_row.pdfIn PDF document text
- http://xiwezalibo.22web.org/zusopowumubaf.pdfIn PDF document text
- http://vorgazme.com/lagimexajeseterumowopexa618xu.pdfIn PDF document text
- http://baugroup.info/dsc_alarm_add_user_codewixyl.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://zuzenif.rf.gd/present_perfect_simple_exercises_intermediate.pdfIn PDF document text
- https://e432c3f7-acc0-403b-bc7f-1b8c16782643.filesusr.com/ugd/6a4899_c1f465a292ea4faba07fe767d11bbcf0.pdf?index=trueIn PDF document text
- https://92fa68c6-d088-48c5-94d9-776fe0504fc0.filesusr.com/ugd/5a053b_74ad515225bc4f989633a6cec9ad7721.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/feseni/brighthouse_financial_life_insurance_forms.pdfIn PDF document text
- https://6b5d12f1-3bbc-48af-9ddb-5430d2fe15e7.filesusr.com/ugd/3bf302_5fbede81f0ea4a4e9a44e637499d6030.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/nademopor/audible_manager_needs_to_update_chrome.pdfIn PDF document text
- http://xojukoliw.epizy.com/38431963127.pdfIn PDF document text
- https://f72b89be-0fa6-41ee-8162-331329ef78ce.filesusr.com/ugd/95089d_0a9e0e4bb72940649c1fc54191b3d4d7.pdf?index=trueIn PDF document text
- https://7c8f45b7-e058-4e27-bccd-8ee7dcb26900.filesusr.com/ugd/d5cf39_e3f8d5b15c6b4da7ad4b8f32d29f575b.pdf?index=trueIn PDF document text
- https://cfecb619-c0f5-418d-ae9d-b1147643389f.filesusr.com/ugd/4cd51e_47cc9a0d83514cefa68475df4a4a1878.pdf?index=trueIn PDF document text
- https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_8b672c3c404a41bd9410ac1be03f9b0e.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/podawakumepewez/ford_digital_obd1_code_reader.pdfIn PDF document text
- https://s3.amazonaws.com/woneketelak/sherlock_holmes_book_series.pdfIn PDF document text
- http://rojumaninewevu.rf.gd/online_converter_to_to_ppt.pdfIn PDF document text
- https://s3.amazonaws.com/vonusirukete/lafovu.pdfIn PDF document text
- https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_ea09328fb1bd4b379d0304c5e9c7586a.pdf?index=trueIn PDF document text
- http://kojajopi.epizy.com/munufura.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_off0000f34f.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF34F | 5128 bytes |
SHA-256: 3f8632bb632965ea8181da5c18aa437da723599810020259f42c3aeef199c318 |
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font_01_sfnt_off000104ec.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x104EC | 10728 bytes |
SHA-256: 6aca22b685d2e12cec0585decf6dfb070627a0deb6b915bedae3a70d4e3c3e49 |
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