Malicious PDF — malware analysis report

Static analysis result for SHA-256 1681c68f0df81718…

MALICIOUS

PDF

64.9 KB Created: 2021-02-12 16:52:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: bb744d4387df384bdacc274c18913cd3 SHA-1: e3e1753deb013d998e4ff25c90365771a1362315 SHA-256: 1681c68f0df81718b9bfa5f8274258d360ae2ade9daa883fee4fb2f6def0a36d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/wix?keyword=idog+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/sepovili/eKWpujb/miwiwa.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/ca23443ede.pdfIn PDF document text
    • https://cdn.sqhk.co/ruduligived/qifmoje/zojedogezojefozadusivuped.pdfIn PDF document text
    • http://mebutef.22web.org/30602702263.pdfIn PDF document text
    • https://xojovirasada.weebly.com/uploads/1/3/1/6/131637125/doziravezekupuf.pdfIn PDF document text
    • https://linepapimufuto.weebly.com/uploads/1/3/1/6/131637640/bafijivosozar-jifozarulegubef.pdfIn PDF document text
    • https://zorimogitew.weebly.com/uploads/1/3/4/4/134487520/1580926.pdfIn PDF document text
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/sisux.pdfIn PDF document text
    • https://vasejafarobi.weebly.com/uploads/1/3/1/4/131454155/f069b17.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/WdjcGie/sword_art_online_gameplay_pc.pdfIn PDF document text
    • https://nezovudaposuru.weebly.com/uploads/1/3/0/9/130969726/2378458.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://najanezajuv.epizy.com/37039506328.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/jizijodakafo.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/design_and_analysis_of_algorithms_mit.pdfIn PDF document text
    • http://nefigubisi.epizy.com/40888212231.pdfIn PDF document text
    • http://nitumajalu.epizy.com/icloud_bypass_3._0_free.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_off0000c367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC367 5196 bytes
SHA-256: de804d9e27f298ae256ff24c79154f48f17ad331ba584b34c1afef0baa8babfd
font_01_sfnt_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 9956 bytes
SHA-256: c03942e4b092c65187eda33ba57e0a2747f5f10c004722ca0101d9f7489e54fe