Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06028b9257d1988…

MALICIOUS

PDF

80.5 KB Created: 2021-03-20 21:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0ee0ce101c53fe32e24b3f267f8e8b1f SHA-1: 83c6cead22dc739e243deb5732ef9f98f3acbd7f SHA-256: c06028b9257d1988efcf667e7904e33c95c6ea167fef6d0f06119f7e70ec1e50
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The 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.
  • Embedded URL info EMBEDDED_URL
    One 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://resalured.ru/123?utm_term=star+wars+all+movies++kickass PDF link annotation
    • http://mudelukise.iblogger.org/conjunctions_worksheets_grade_2.pdfIn PDF document text
    • http://zajozin.22web.org/tutorial_on_vba_for_excel_macros.pdfIn PDF document text
    • http://zuzotolifewujex.22web.org/mexubetivafodilo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_a326e81671e340699c464ecca79d3e76.pdf?index=trueIn PDF document text
    • http://tokaverojov.epizy.com/how_do_u_book_an_appointment_at_the_apple_store.pdfIn PDF document text
    • http://nabiporemug.epizy.com/felugebonir.pdfIn PDF document text
    • http://konivad.epizy.com/54088598542.pdfIn PDF document text
    • http://lamuverifob.epizy.com/90869084473.pdfIn PDF document text
    • https://313cea95-bd78-4864-9d9d-3b26c3bbe0bd.filesusr.com/ugd/2142af_44923f3635604a4dbc3c675cd249cda4.pdf?index=trueIn PDF document text
    • http://sisotakeb.epizy.com/2471275221.pdfIn PDF document text
    • https://s3.amazonaws.com/neporezofov/iams_kitten_wet_food_feeding_guide.pdfIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_4d26a42097e644c493febbc8d447e773.pdf?index=trueIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_ce062bcd70514cedb776fd19790857af.pdf?index=trueIn PDF document text
    • https://d3919fa5-c020-464c-a773-72e456e10464.filesusr.com/ugd/29136f_93657f1e8bcc4db4b7a3e41a775eae6f.pdf?index=trueIn PDF document text
    • http://gurimexuma.epizy.com/amway_products_price_list_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/bezorito/vlookup_function_tutorial.pdfIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_d4da15ecb7644e3bb856d22f9715648b.pdf?index=trueIn 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.

FilenameKindSourceSize
font_00_sfnt_off0000fc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4D 5264 bytes
SHA-256: e6ce0233ed6ed0fa47d9654fa46419c0a887218068b0b4e20e5e52d2f2935607
font_01_sfnt_off00010e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E35 10928 bytes
SHA-256: ecaddbcee916fc09673eeaab34fc4cd17378b7a07d8e420a5da9d7662eeeb284

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