Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdf317de02b694ac…

MALICIOUS

PDF

92.6 KB Created: 2021-04-07 18:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5cac04cd56146772299afe36838e538c SHA-1: 97a86233d7cc10800862da34b5cc063b1c86485d SHA-256: fdf317de02b694aca2dfceb41cbb91ebc4276824d0ede4b7f41b8023434606d0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The ML classifier strongly indicated maliciousness, and the PDF contains numerous embedded URLs pointing to various domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to manipulate search engine results or distribute malicious links. While no scripts were explicitly extracted, the presence of many external URIs indicates an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://seumenha.ru/wix?keyword=2011+vw+golf+tdi+manual+transmission PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368223/normal_5fc7648785292.pdfIn PDF document text
    • http://onenature.space/7861037892463slc.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/5igPgcV/dudeka.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/fghihge/sd_card_reader_for_iphone_uk.pdfIn PDF document text
    • https://nosovaranipad.weebly.com/uploads/1/3/4/7/134743093/bedidajuwelovob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_5fec5236ec9b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5fdc2eed9bdeb.pdfIn PDF document text
    • http://hookup682.site/67378837849l7mhb.pdfIn PDF document text
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/5f52cc37f.pdfIn PDF document text
    • https://filinisosiwox.weebly.com/uploads/1/3/0/8/130814007/leruvalusafepesevupe.pdfIn PDF document text
    • https://cdn.sqhk.co/fakozunada/nigjfMD/tanukebesawurefapotu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_6031e2aa4c1ed.pdfIn PDF document text
    • https://fanepolareroroz.weebly.com/uploads/1/3/4/6/134666972/9078030.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxuduxexi/5UnjhiZ/xukagalewib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/194a5f19-ef24-4948-9398-ad6069373261/vajolilomebaganugoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8695791f-6075-4e6b-87d4-1ee639f6b8ff/sogileludomipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f78fea8-ae76-4c46-9e96-87ad241352f3/formato_de_solicitud_de_empleo_para_llenar_e_imprimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b23da01c-aba6-495a-ac53-13c81482d1d6/metatubirixutilowimosul.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.

FilenameKindSourceSize
font_00_sfnt_off0001305c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1305C 5612 bytes
SHA-256: cf57d82c6539576dd85568c17e068fa69ce11499e967b5e8bbd543feb55ed18f
font_01_sfnt_off00014376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14376 9732 bytes
SHA-256: 8c8a48b9c53fd128af68b1cdb504aa0f52404cd7c1a894a5b3d91809b8deb9b9

Open this report in the interactive analyzer, or submit your own file for analysis.