Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a40f0bdafee4b12…

MALICIOUS

PDF

75.7 KB Created: 2021-02-15 05:21:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 02bd0084979e8203a94374fd8ba7f96c SHA-1: d1870d8781b01d7f4f170f5c70b0d1025b4dd656 SHA-256: 4a40f0bdafee4b128f90a17709e0deefe63f9e7e2e7b00bd27645c028d9b58e5
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/aws?utm_term=url+rewrite+iis+6 PDF link annotation
    • https://serarabasujuz.weebly.com/uploads/1/3/1/6/131606617/1028354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388065/normal_60127723adae2.pdfIn PDF document text
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/gugipinabekisa-mogoke-xifalonofe-kikabop.pdfIn PDF document text
    • http://pagebake.com/64788839591o0esp.pdfIn PDF document text
    • https://fotiterik.weebly.com/uploads/1/3/5/3/135328456/af94766.pdfIn PDF document text
    • http://prizinsta.site/lego_chess_macitzpv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479933/normal_5fefbb6b95350.pdfIn PDF document text
    • https://digonowokeke.weebly.com/uploads/1/3/1/8/131856318/862581.pdfIn PDF document text
    • https://funemozivadomuz.weebly.com/uploads/1/3/1/3/131398429/2146453.pdfIn PDF document text
    • http://pomirkapa.site/2995782515299ke2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480904/normal_5fcb90d8513c3.pdfIn PDF document text
    • https://rojuligu.weebly.com/uploads/1/3/0/9/130969709/ritoga-bebabi-goruzezotup-janaje.pdfIn PDF document text
    • http://magicwoolshop.com/53289093350mj6vm.pdfIn PDF document text
    • http://7lessons.website/mekevemezftxz0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486061/normal_5fc74351ae239.pdfIn PDF document text
    • http://hookup668.site/711082930415d4yq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367645/normal_5ffc726570a61.pdfIn PDF document text
    • https://kukitame.weebly.com/uploads/1/3/1/3/131379641/1447001.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EC 4704 bytes
SHA-256: 6b65b8c69461102f138c85079db56eba69e47a16d45060bd3e431af0bed1eb50
font_01_sfnt_off0000f913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF913 12620 bytes
SHA-256: 86b877a3c362b965cd18c7e0495f220d7d17064445bd45fb8213b73af938f1cb

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