Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a531e02167fd157…

MALICIOUS

PDF

74.2 KB Created: 2021-02-27 20:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5b55c06427a38386d77a1bd9455d80c3 SHA-1: 88345e9d6130bb8482584f95aa1a56bce42450f4 SHA-256: 4a531e02167fd157b3688159e54443f2ab09b585f85f154ccd73a631e3710b04
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://baarspo.ru/wb?keyword=new%20yorker%20subscription%20deal%202019 PDF link annotation
    • http://cosmosqrab.online/vipadow1t5.pdfIn PDF document text
    • https://rabibenexu.weebly.com/uploads/1/3/5/3/135319922/turodefogefoxajaf.pdfIn PDF document text
    • https://pofubelepegeva.weebly.com/uploads/1/3/0/7/130776421/af8294af74f87.pdfIn PDF document text
    • http://springital.fun/dojiguk0kmd.pdfIn PDF document text
    • https://xexonukomamub.weebly.com/uploads/1/3/4/3/134353621/1635570.pdfIn PDF document text
    • http://sibuvre.com/gilovuzogij06kc.pdfIn PDF document text
    • http://bilet-pdd.site/20725220791k31mg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380682/normal_5fca8614d16a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5fe70728de373.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_6038fc7dd637a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_60399c5b48e4b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501963/normal_603973bf4618e.pdfIn PDF document text
    • https://widijozitumude.weebly.com/uploads/1/3/4/6/134688085/5166868.pdfIn PDF document text
    • http://magnitoli-2ekran.site/fotudatokizzy2b4.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/what_does_seasonal_employee_mean.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371505/normal_60367b820af81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378852/normal_5ffd4d1c63732.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/rosuri.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e01d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01D 5916 bytes
SHA-256: fb905ba829c51c316bd515dd0bad4290fbc29fb6b4415f61cf3db6f67750ff7f
font_01_sfnt_off0000f468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF468 11628 bytes
SHA-256: be568aa3f3e7a82114a09c02d60ca4de6a666bf75afac296508241becbf6773b

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