MALICIOUS
286
Risk Score
Malware Insights
MITRE ATT&CK
T1566.001 Spearphishing Attachment
T1059.007 JavaScript
The PDF contains an embedded script and multiple external URIs, indicating it's designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded script likely facilitates the download and execution of a second-stage payload, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic.
Machine Learning
- Nyx PDF Classifier malicious score 0.9997
Heuristics 8
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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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Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOADPDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
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LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMANDExtracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
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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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Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGEOne or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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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://leonvi.ru/wix?keyword=college+of+charleston+off+campus+meal+plans PDF link annotation
- http://muldwych.com/special_ed_teacher_assistant_job_descriptionmssbh.pdfIn PDF document text
- http://dommasters.site/21088229510i0oeu.pdfIn PDF document text
- http://pornbustyvids.com/dubimiwigetofuzorajenbu526.pdfIn PDF document text
- http://com-copyrighit.com/sheet_metal_fabrication_jobs_in_dubaidotg4.pdfIn PDF document text
- http://vuwadezizubem.22web.org/software_alcohol_120_free.pdfIn PDF document text
- http://ig-copyrighthelpcenter.com/tuburorutagenazukovert31a7.pdfIn PDF document text
- http://gukiduwonaxinef.getenjoyment.net/jalenumuxeregej.pdfIn PDF document text
- http://jasetukuxazep.22web.org/configure_reporting_services_2016_powershell.pdfIn PDF document text
- http://zabavnyi-slon.ru/how_do_you_reset_a_bosch_tankless_water_heaterikj6x.pdfIn PDF document text
- http://energytik.net/pakadugibejavogevixa50hdt.pdfIn PDF document text
- http://zabavnyi-slon.ru/how_do_you_reset_a_boIn macro / runtime command snippet
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://dalotidel.epizy.com/52415456970.pdfIn PDF document text
- http://woxutonugosafer.epizy.com/63303418910.pdfIn PDF document text
- http://kesekerezox.epizy.com/bulaklakan_folk_dance.pdfIn PDF document text
- http://pevunezix.epizy.com/82339508955.pdfIn PDF document text
- http://pimobepetokonud.myartsonline.com/52223289932.pdfIn PDF document text
- http://mudatelifawuvo.rf.gd/metabolismo_tv_libros.pdfIn PDF document text
- http://mijogivuxob.epizy.com/vapifegazarenon.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/82d0fa88-a53c-49e1-af24-702f6bc19aac/miller_bobcat_225_price_canada.pdfIn macro / runtime command snippet
- http://tapalif.epizy.com/autocad_2008_full_crack_32bit.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ea7f0ba9-dbd3-440d-aa7c-5c965631111e/the_drummer_boy_of_shiloh_collections_book_answers.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
Extracted artifacts 4
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_pdf_script_000099e4.bin |
pdf-embedded-script | PDF decompressed stream script payload at offset 0x99E4 | 83953 bytes |
SHA-256: 49a45bf0c54e7b4988dddeaa8fa28caad1f8292a81e85193101b142f108d7288 |
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Detection
ClamAV:
Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Obfuscation or payload:
likely
Carved artifact contains 1 shell/COM execution token(s).
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Preview scriptFirst 1,000 lines of the extracted script
%PDF-1.4
1 0 obj
<<
/Title (�� C o l l e g e o f c h a r l e s t o n o f f c a m p u s m e a l p l a n s)
/Creator (�� w k h t m l t o p d f 0 . 1 2 . 5)
/Producer (�� Q t 4 . 8 . 7)
/CreationDate (D:20210318185257+02'00')
>>
endobj
3 0 obj
<<
/Type /ExtGState
/SA true
/SM 0.02
/ca 1.0
/CA 1.0
/AIS false
/SMask /None>>
endobj
4 0 obj
[/Pattern /DeviceRGB]
endobj
6 0 obj
<<
/Type /XObject
/Subtype /Image
/Width 625
/Height 155
/BitsPerComponent 8
/ColorSpace /DeviceRGB
/Length 7 0 R
/Filter /DCTDecode
>>
stream
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... (truncated)
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font_00_sfnt_off0000ea2d.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xEA2D | 5332 bytes |
SHA-256: 5c65186e2d0120d63417dfe3f115449926ed76eb0db2efa1c1402d807b408ab0 |
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font_01_sfnt_off0000fc2b.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0xFC2B | 11440 bytes |
SHA-256: e273a7ff036b64323725571ce23535526d4e5a544464a643e29a86e0820cdfa4 |
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font_02_sfnt_off00012352.bin |
pdf-font-stream | PDF embedded font (sfnt) at offset 0x12352 | 16204 bytes |
SHA-256: 541fa2b6826b0add99b7d5a173ef1e6a5567607b5192f75b810eb17d6a563501 |
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