MALICIOUS
226
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1203 Exploitation for Client Execution
T1059.007 JavaScript
The PDF document employs a social engineering lure, instructing the user to install a browser extension or update under the guise of installing a Zotero connector. This is a common tactic to trick users into downloading and executing malicious payloads or providing sensitive information. The presence of numerous external links, many pointing to disposable domains, further suggests a malicious intent to distribute or host malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.9998
Heuristics 7
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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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Browser extension / update installation lure high SE_BROWSER_INSTALL_LUREDocument tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
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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://xezojetit.ru/strik?utm_term=how+to+install+zotero+connector+for+firefox PDF link annotation
- https://perisabirazuro.weebly.com/uploads/1/3/1/4/131437425/34262b.pdfIn PDF document text
- http://ezfix.asia/706761247822baz0.pdfIn PDF document text
- https://livabobuladezer.weebly.com/uploads/1/3/0/8/130874084/dowidewurimug.pdfIn PDF document text
- http://studytogether.fun/western_christmas_wallpaper_hd6f4ba.pdfIn PDF document text
- https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/xefagesum-gumuroki-dumal-rodoxunixuj.pdfIn PDF document text
- https://pefobasor.weebly.com/uploads/1/3/4/1/134131397/kivekexexetede-motamep-zimivafelutap-xuwimapeten.pdfIn PDF document text
- https://fugesozuxi.weebly.com/uploads/1/3/0/7/130739141/2637257.pdfIn PDF document text
- https://jojijuwewit.weebly.com/uploads/1/3/6/0/136057333/nagawawitinonenawef.pdfIn PDF document text
- https://xigakoter.weebly.com/uploads/1/3/1/3/131379919/3925376.pdfIn PDF document text
- https://github.com/zotero/zotero-connectors.gitIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://s3.amazonaws.com/godoremitiwuja/quadratic_equation_vertex_form_examples.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/faa795a0-5b1f-48d2-ba81-6fba2834726e/jokegonoxodekejijatile.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a922a5a4-d4f0-4b2b-b8de-b3f668ade686/10204178208.pdfIn PDF document text
- https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_bfb0069ed45845a19bbfa97e2b1f4f25.pdf?index=trueIn PDF document text
- https://c931c956-7f53-4e4e-96dc-27d7f003ba63.filesusr.com/ugd/b80c10_cdb43f00e1e446ca8f71440f19c31a7a.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/mipizaju/24767470474.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/8ff2bf7c-9c6c-471c-ac6a-6fbabb3ef2cd/josirevuwegud.pdfIn PDF document text
- https://s3.amazonaws.com/sowirutelevolur/aeroplane_full_song_djpunjab.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_off0000eed5.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEED5 | 5044 bytes |
SHA-256: f653b8e18c4c13b64edacc318dca6803f1c29d5173a3db835c9d4cdf0c2f6d37 |
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font_01_sfnt_off0001002a.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x1002A | 10536 bytes |
SHA-256: 82b0ebc7e3575a4783bec7653fdb908388612b31ae7d47d8c223aa5218175fbf |
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