Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e10db8a33f01c6…

MALICIOUS

PDF

67.9 KB Created: 2021-03-12 04:42:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3f6e9e48a8c33dc5984df2776af3d3e8 SHA-1: c296143c9961b7f56d0bc9098e9c45ff774d630c SHA-256: 23e10db8a33f01c6fb016f0c7e3dc30d91ff5f5ca2d20d250cec302841f96257
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting and employing UTM parameters, indicative of a link farm or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further payloads or conducting phishing. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=evil+dead+3+tamil+movie+hd PDF link annotation
    • https://boseveju.weebly.com/uploads/1/3/4/5/134595203/nebuv-kugejomuvakafel.pdfIn PDF document text
    • http://luchdobro.site/205153125934mg2s.pdfIn PDF document text
    • https://fosuwelu.weebly.com/uploads/1/3/2/6/132695698/a7a5c5df4.pdfIn PDF document text
    • http://geloritiveda.mygamesonline.org/the_merry_adventures_of_robin_hood_chapter_3_summary.pdfIn PDF document text
    • http://pemewozeresozo.22web.org/money_banking_and_finance_by_nk_sinha_download.pdfIn PDF document text
    • https://xutonipojoneri.weebly.com/uploads/1/3/4/6/134667901/3955511.pdfIn PDF document text
    • http://theplafond.xyz/discord_nitro_free_crackge5ob.pdfIn PDF document text
    • http://pumba-timon.space/lozudidupasosoz7kxkm.pdfIn PDF document text
    • http://bluhgang.best/garabejoguripopenon0ahk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_6019dfe2bb68e.pdfIn PDF document text
    • http://zadebunijuzo.22web.org/tomunibafer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366324/normal_604ab01d1a64d.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/refagasenoti.pdfIn PDF document text
    • https://jotigigej.weebly.com/uploads/1/3/0/7/130739509/6860923.pdfIn PDF document text
    • http://sorakazuvopez.iblogger.org/35971311269.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da99f664-88c7-4a27-98aa-0bbcec2e8f57.filesusr.com/ugd/66f3f9_fbdf03987f8b44428599b9da8726b85f.pdf?index=trueIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_e2dabd7c2b774561b71d5ef5ed4efdc3.pdf?index=trueIn PDF document text
    • http://xirasajizobopa.rf.gd/76386278009.pdfIn PDF document text
    • http://zoxokukazo.epizy.com/forms_of_idolatry_in_kenya_today.pdfIn PDF document text
    • http://jaweratiz.atwebpages.com/vuvelituleve.pdfIn PDF document text
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_75a1e02b80ed438299652b9b07c530ca.pdf?index=trueIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/conair_clipper_blade_adjustment.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_off0000ce1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1C 4972 bytes
SHA-256: 5117e3848578e8ae0f5a3c854d3149dfef3480dc822a8b12480c53e4272afe0d
font_01_sfnt_off0000deec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEEC 10480 bytes
SHA-256: 17846c4b300e578fe9c2751a13df779c855f7174b83c4a6c00b14f80794efa0d