Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f467782f0e37d6d…

MALICIOUS

PDF

79.5 KB Created: 2021-01-26 01:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 62cd922c2a7040d24ca9601aa2e209a2 SHA-1: 6d28fa707b646a626f52c413d097630cedf0c1bd SHA-256: 1f467782f0e37d6d5d62001752b70b9bea80d9e236416136b6e4acbd01c5054a
66 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or low-reputation platforms. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document's purpose is to act as a link farm, likely for SEO manipulation or to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/123?utm_term=corruption+of+earth+and+seed PDF link annotation
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/5205135.pdfIn PDF document text
    • http://vezapom.iblogger.org/aluminized_steel_sheet_gauge_chart.pdfIn PDF document text
    • http://togurebuk.66ghz.com/paraiso_perdido_filme.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423442/normal_60050b5063e87.pdfIn PDF document text
    • https://zemapefim.weebly.com/uploads/1/3/4/4/134485651/nudonexo_kimad_lixuvado.pdfIn PDF document text
    • https://dajitogaxafolix.weebly.com/uploads/1/3/1/1/131164176/vadobanedojozibak.pdfIn PDF document text
    • http://gikadoketu.iblogger.org/marazzi_guide_rail_china.pdfIn PDF document text
    • https://pujuwofox.weebly.com/uploads/1/3/4/8/134882524/pidopodubowu.pdfIn PDF document text
    • http://xudogiborijum.66ghz.com/rudosewesilerefatifef.pdfIn PDF document text
    • http://jotijitod.66ghz.com/rutuwomelubetixibowolo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://widafasamuj.epizy.com/bangla_typing_keyboard_for_pc.pdfIn PDF document text
    • http://dobejul.epizy.com/82909812632.pdfIn PDF document text
    • http://jisufuwoj.epizy.com/didisogidegexibizawi.pdfIn PDF document text
    • http://wobemiko.epizy.com/gana_baja_de_dj_song.pdfIn PDF document text
    • http://mekavebij.epizy.com/how_to_make_book_in_illustrator.pdfIn PDF document text
    • http://rewifavad.epizy.com/channelling_my_spirit_guide.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_off0000fa60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA60 5004 bytes
SHA-256: e93116e41c6701d00f6ad24e6a83d181c1db477036831e671077366566ac1cf5
font_01_sfnt_off00010b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B58 11284 bytes
SHA-256: fcf7f3a5cc80f0223616b911104082ab8fa8463d4da4ca81d15784665870ad06

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