Malicious PDF — malware analysis report

Static analysis result for SHA-256 26d4b189f6d87b5d…

MALICIOUS

PDF

72.1 KB Created: 2021-03-08 03:55:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7bf03332b830618edd1aaa18f6169e66 SHA-1: d83bd5df3a70dcaa2cf11fc85edcfebe71886fdb SHA-256: 26d4b189f6d87b5dc9a418b471b4a13fd9536f44f062a03954e351fde7b9214a
196 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://ponafet.ru/award?keyword=how+many+octaves+is+normal+vocal+range PDF link annotation
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/6072158.pdfIn PDF document text
    • https://xemibunadagom.weebly.com/uploads/1/3/4/6/134639404/fexidiwa_jixevevowatebi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490519/normal_5fcf4531e6360.pdfIn PDF document text
    • https://sojenakituvewo.weebly.com/uploads/1/3/3/9/133986345/posedejuvel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426549/normal_60143b2cc48dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386828/normal_6036356eddbee.pdfIn PDF document text
    • http://rukunikuxajosog.22web.org/zuwitebusiw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_60434001aea60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402721/normal_5fe95380252e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477173/normal_5fe79f851b930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408464/normal_5fdc0f0c24cc9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wegemebufojafak/kukatifugumitefuvur.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/food_safety_net_services_omaha.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/assistant_commandant_upsc_syllabus.pdfIn PDF document text
    • http://gotuziput.epizy.com/spirit_guides_calling_your_name.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/bleacher_report_tennis_serena_williams.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/87018544462.pdfIn PDF document text
    • http://duxurulokij.epizy.com/90560981239.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/50396564380.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/cgeit_review_manual_7th_edition_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_off0000de6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6C 5336 bytes
SHA-256: 0062162d63b89614f8c98661b45fc4ef132db72292bc32ac2cd864f73d142613
font_01_sfnt_off0000f094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF094 10064 bytes
SHA-256: 086773713d2a91271a6dde8db02f3d65228c48ee1bfd1e08672f0166eb81dfa5

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