Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97737bcedde66ff…

MALICIOUS

PDF

76.2 KB Created: 2021-04-28 07:22:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ad8c4785fab9411fc0e733958832832c SHA-1: f5a888db98a9087bacd7fb41cfc171f5d829596b SHA-256: d97737bcedde66ff154f4b45631688632efbc2b5ba6c6dfed13996cfebc296f5
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that are part of a link farm, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://soxebez.ru/strik?utm_term=who+makes+john+deere+intek+engines PDF link annotation
    • http://tofotibuwul.sportsontheweb.net/95603703850.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/antisepsia_quirurgica.pdfIn PDF document text
    • http://dokasat.22web.org/mechanical_ventilation_neonates.pdfIn PDF document text
    • https://noremovex.weebly.com/uploads/1/3/4/8/134883944/16fafe83365c305.pdfIn PDF document text
    • http://wumupowon.22web.org/beer_lambert_law_limitations.pdfIn PDF document text
    • http://dragonflysagewellness.com/the_upside_of_stress_kelly_mcgonigal_downloadkcqb5.pdfIn PDF document text
    • http://vashobereg.com/wall_street_journal_bias_quoranslwi.pdfIn PDF document text
    • https://xixusumer.weebly.com/uploads/1/3/0/8/130814933/govosamuzejakova.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/ggPghq9/galekusaxuvodixiduvavunik.pdfIn PDF document text
    • https://cdn.sqhk.co/jesovolavig/jiiiRgh/name_rahul_ringtone.pdfIn PDF document text
    • https://beziremisolexew.weebly.com/uploads/1/3/4/6/134656792/buwumemigepavo.pdfIn PDF document text
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/xilutubide.pdfIn PDF document text
    • http://1gusevshop.space/642388057283p1ht.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/xNigihc/wordsmith_tools_free_version.pdfIn PDF document text
    • http://gnoogle.site/gitabozebaxezivetho99h.pdfIn PDF document text
    • https://babivefe.weebly.com/uploads/1/3/5/3/135312435/410d81.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xikepilapap.rf.gd/vebepezaloj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc799593-7425-4347-831a-d8e552bfd408/88109132842.pdfIn PDF document text
    • http://sogoxutagejuno.atwebpages.com/pogukafafivik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e5f2399-6665-47ac-b368-51480df83a23/46072167428.pdfIn PDF document text
    • http://jowosos.myartsonline.com/16996080677.pdfIn PDF document text
    • http://topemuzopapegu.epizy.com/niwotexasaduwegofib.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_off0000eb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB96 5360 bytes
SHA-256: dbe93c6a479aebcd35abd59fa4800def2112428a32d8711fc62c5ec54d0007d3
font_01_sfnt_off0000fdb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB2 11064 bytes
SHA-256: c350e433337b5911592c928ecd01085918e271167b3314ad7fbef672d8df1749

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