Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3b093a43dd9fd2…

MALICIOUS

PDF

72.9 KB Created: 2021-02-11 14:56:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a86c4ecee3aecc3bd44c593f86227bce SHA-1: b90a70ee1bf8b05734ae8ce21c208993162b25e3 SHA-256: 7a3b093a43dd9fd2f68aba64ba53e2f68048ad8647784cddb7b57edddcec2077
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=vocabulary+workshop+level+b+unit+1+answers+completing+the+sentence PDF link annotation
    • https://xexiroxenokela.weebly.com/uploads/1/3/4/6/134613030/4989520.pdfIn PDF document text
    • http://kpovli.ru/lonerism_hoodie_for_saleqznk5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449001/normal_600dbce2eda57.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/c3aNjdy/90020766277.pdfIn PDF document text
    • https://cdn.sqhk.co/jedepazisu/bSjcDif/marlboro_ice_blast_price_coles.pdfIn PDF document text
    • https://nexudusuje.weebly.com/uploads/1/3/0/7/130740550/37d6c0bbe.pdfIn PDF document text
    • http://comp-arenda.site/577881945251bs1w.pdfIn PDF document text
    • http://probmake12.xyz/67268929498a98sb.pdfIn PDF document text
    • https://figapizezedop.weebly.com/uploads/1/3/4/3/134364787/tepuxuvulimaxirip.pdfIn PDF document text
    • http://legko.travel/top_10_hits_of_the_60s_cdaktki.pdfIn PDF document text
    • https://jibizixowaxen.weebly.com/uploads/1/3/5/2/135296653/xogatew_lakafa_gikid_nineruxaremadu.pdfIn PDF document text
    • https://mokonalu.weebly.com/uploads/1/3/0/7/130739423/gilogiman_wekigal.pdfIn PDF document text
    • https://zuwojutiraz.weebly.com/uploads/1/3/4/7/134729165/jawon-lopabunozuxorur-lamomaxum-jimopibukujel.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/848041998781gy5b.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_off0000dfe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE5 5820 bytes
SHA-256: 272714d3b9ca6f3681fa7299f23324a5581bc028d28bd97735f260f63ea35a4d
font_01_sfnt_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 10072 bytes
SHA-256: 2026fc640c85f7439a838cd0d2b4fd6721bcfcc88d815c619b9e4962a7408070