Malicious PDF — malware analysis report

Static analysis result for SHA-256 9518da0eebe95a69…

MALICIOUS

PDF

78.2 KB Created: 2021-05-30 06:04:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c30e3e85c0f55a5176832eed121231b8 SHA-1: d0945065b03cac2d6c6a8c3fe9ce786fb6eb17a5 SHA-256: 9518da0eebe95a69f910d017b5412064bedf0f2995a88370dcd99eaa01978096
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm designed to manipulate search engine results. The primary URL, dugedepap.ru, is likely part of a phishing or scam operation, attempting to lure users with the promise of a free download. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://dugedepap.ru/strik?utm_term=sanford+guide+to+antimicrobial+therapy+2018+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4379045/normal_5fc8fb06d85b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379236/normal_5ff224e9d57c6.pdfIn PDF document text
    • https://mitixofixomu.weebly.com/uploads/1/3/4/3/134333727/407648.pdfIn PDF document text
    • https://mojipidu.weebly.com/uploads/1/3/4/3/134391160/nenepokujoxikemafogu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_601d79bbb0c06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455645/normal_5fc74beeaae18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421335/normal_6039140652cbb.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/gutetasevato-dodewelusuk.pdfIn PDF document text
    • https://nilorajokurede.weebly.com/uploads/1/3/4/6/134626806/pizasaluvidutareweko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411919/normal_6017a9e7e17a2.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/muzesoxefoz.pdfIn PDF document text
    • https://tosofeguwus.weebly.com/uploads/1/3/4/3/134321705/fa5058453f38ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500446/normal_6002e49c07749.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444864/normal_5fee9af238c61.pdfIn PDF document text
    • https://lawoxotat.weebly.com/uploads/1/3/4/5/134587222/jifisibovofowon.pdfIn PDF document text
    • https://tubidurifubadas.weebly.com/uploads/1/3/4/8/134885002/83701f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460076/normal_6022da4ea6116.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412762/normal_6046f619ec646.pdfIn PDF document text
    • https://tilesutetogetu.weebly.com/uploads/1/3/4/0/134042518/814cd9716559b.pdfIn PDF document text
    • https://nagipabusodeza.weebly.com/uploads/1/3/1/4/131453106/e20a7811953179b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457318/normal_5fe0f4c614928.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_off0000ee39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE39 6348 bytes
SHA-256: bdbafd11082d115d16669d649d60b17cb195f0c141cb963b3a52986e683acfd6
font_01_sfnt_off000103c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103C3 11464 bytes
SHA-256: 1219b74818b5c3a1875e427ac69b6e2d5b2177de831358ca5cb4b0aa396a8f60

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