Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d83a03b51e7bc48…

MALICIOUS

PDF

76.5 KB Created: 2021-03-26 10:09:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c8db6a03f6b989552197f8fe1926729 SHA-1: d497020395146adcd3c1570078ef62934f52f23a SHA-256: 2d83a03b51e7bc480c070136e8c4c60c771f646662581508ae5c87f4d62550a4
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://druttle.ru/strik?utm_term=john+deere+ride+on+mower+spare+parts+uk PDF link annotation
    • https://cdn.sqhk.co/monazaxumol/2KSihjj/anime_wallpaper_lockscreen_anime_full_wallpaper_hd.pdfIn PDF document text
    • https://firudofomupavu.weebly.com/uploads/1/3/1/3/131384713/wuwowa_wegeb.pdfIn PDF document text
    • http://boforotaje.mywebcommunity.org/delonijovubi.pdfIn PDF document text
    • https://cdn.sqhk.co/nanubebebot/jigLibh/farmacologia_ansioliticos_e_hipnoticos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_60036c26541cb.pdfIn PDF document text
    • http://gagogepatajebe.medianewsonline.com/5_text_structures_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/KhjjghV/10305942558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365551/normal_5fe9f120b7bec.pdfIn PDF document text
    • https://foziwumiwogesis.weebly.com/uploads/1/3/5/3/135321673/goxaz.pdfIn PDF document text
    • https://cdn.sqhk.co/tisewesir/0yDggMc/43334869856.pdfIn PDF document text
    • http://wufamega.scienceontheweb.net/nuzeza.pdfIn PDF document text
    • http://liketasi.22web.org/84063629106.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fodabobaxuti.epizy.com/error_analysis_ratios_and_proportional_reasoning_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/76842815245.pdfIn PDF document text
    • http://zefajutuwe.epizy.com/infographic_templates_keynote.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/vuwarote.pdfIn PDF document text
    • http://fuxivupinamipi.rf.gd/automatic_calling_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/64651995723.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_off0000eddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDC 5312 bytes
SHA-256: 2196ecb450bb1ec643f7418ce15863d89ae8f884308df6c959dd98a126367817
font_01_sfnt_off0000ffc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC7 10800 bytes
SHA-256: 96e68914a73c2b632c8d856780220e464699297beff3fa5a70f40a13aafc7ed6