MALICIOUS
164
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF file contains a large number of external links, many of which are likely part of a link farm designed to improve search engine rankings. One of the primary links, 'https://vilenefex.ru/strik?utm_term=how+to+reply+for+probation+confirmation+letter', is flagged as unknown reputation and is likely the intended malicious destination. The presence of a 'download' button lure further supports a phishing or malware distribution attempt. ClamAV detection and ML classification confirm the malicious nature of the file.
Machine Learning
- Nyx PDF Classifier malicious score 0.9996
Heuristics 6
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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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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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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://vilenefex.ru/strik?utm_term=how+to+reply+for+probation+confirmation+letter
- https://pevusipifo.weebly.com/uploads/1/3/4/8/134863194/zawul.pdf
- https://cdn-cms.f-static.net/uploads/4493266/normal_603f372067cdb.pdf
- https://vukosigubew.weebly.com/uploads/1/3/4/8/134860762/buvisakomot.pdf
- https://zorusijumabek.weebly.com/uploads/1/3/4/8/134851431/boridajo-kagubaw-valefaripafim.pdf
- https://jukirabupunux.weebly.com/uploads/1/3/0/8/130874410/4690003.pdf
- https://cdn-cms.f-static.net/uploads/4370528/normal_6040e584e00c3.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://www.daltonmaag.com/
- https://s3.amazonaws.com/sukobogixe/freestyle_wrestling_score_sheet.pdf
- https://s3.amazonaws.com/nitidadufetenu/assistive_touch_pro_apk_2017.pdf
- https://s3.amazonaws.com/moduxanakuri/yasin_suresi_hayrat.pdf
- https://s3.amazonaws.com/loneminovu/38859401300.pdf
- https://uploads.strikinglycdn.com/files/7da6a689-d761-46ca-b218-10f2ecb92159/night_circus_novel_synopsis.pdf
- https://s3.amazonaws.com/nuxulikiwab/78504574796.pdf
- https://uploads.strikinglycdn.com/files/dcfbfbd7-744b-42bb-9560-2a49ff68ff7c/dexuwepowedasu.pdf
- https://uploads.strikinglycdn.com/files/d848e5e2-4fd0-4d94-9d0c-c52fff93ee1d/pudido.pdf
- https://uploads.strikinglycdn.com/files/bd8d2e87-d351-4925-b31e-98b347d5d7d4/39180224281.pdf
- https://uploads.strikinglycdn.com/files/de251e0a-29a0-402b-903c-1e1f97c3b44f/wujepa.pdf
- https://s3.amazonaws.com/goneduzum/gcse_chemistry_the_periodic_table_answers.pdf
- https://uploads.strikinglycdn.com/files/3527d68d-af0d-4847-8962-a5cde695ffc4/powerflex_755tm_user_manual.pdf
- https://uploads.strikinglycdn.com/files/a13f66ad-4790-44ab-9572-afe335c41410/5_minute_bottle_crafts.pdf
- https://s3.amazonaws.com/pavujiniz/80671269827.pdf
- https://s3.amazonaws.com/pevarijidasalop/78401629846.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL
Extracted artifacts 3
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
font_00_sfnt_off0000f3c1.bin8a5739de43d80238e3722a2bbda8045ceef2fa91f54a0995c5ade2933df5057a |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xF3C1 | 5068 bytes |
font_01_sfnt_off000104eb.binb0b6c11a8a6b81482b631958c26feb5b057784325883de2966281f495ed2a757 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x104EB | 10456 bytes |
font_02_sfnt_off000128b7.bincd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34 |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x128B7 | 4324 bytes |
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