Malicious PDF — malware analysis report

Static analysis result for SHA-256 2697617c8554edc6…

MALICIOUS

PDF

79.5 KB Created: 2021-03-14 12:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 90f4194db741b535d2ababfbd043a587 SHA-1: 07aa455c50dcf560206d444383c088758fed80c0 SHA-256: 2697617c8554edc6dbc25fb1783544b036962922ac1c11c1981692796fe9fb00
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many of which point to SEO-optimized PDF hosting sites, suggesting a link farm or phishing lure. The presence of a PDF_SEO_LINK_FARM heuristic firing indicates a large number of external PDF links, and the PDF_SEO_UTM_REDIRECTOR_LINK heuristic points to a specific redirector URL used for phishing. The ML classifier and ClamAV detection further support the malicious nature of this file.

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://midufefew.ru/award?keyword=altered+state+of+consciousness+book+pdf PDF link annotation
    • https://viwukafum.weebly.com/uploads/1/3/0/7/130738591/sinavexapiwisu.pdfIn PDF document text
    • https://vofirojaj.weebly.com/uploads/1/3/1/6/131637635/5445cb.pdfIn PDF document text
    • https://rokufekajo.weebly.com/uploads/1/3/0/8/130814342/15a5d31c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458390/normal_6018335b4c5b8.pdfIn PDF document text
    • https://telisawe.weebly.com/uploads/1/3/4/4/134466193/mevalez.pdfIn PDF document text
    • http://qupieasy.online/thesaurus_activities_for_4th_gradem2yzv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_603c1e66b6aee.pdfIn PDF document text
    • https://xuniruki.weebly.com/uploads/1/3/0/7/130739043/gezevogigupu_gujotup_xuzowan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393197/normal_601ce61667865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387031/normal_6023e0f42eee5.pdfIn PDF document text
    • http://soldatskaya6.ru/tolosisaxiwepemov1x0v9.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/rekawexuretowo/1858870463.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_f0d87d11819d4c2d8bf0587ac225051e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/90065166434.pdfIn PDF document text
    • https://ef2e072a-e8a2-4438-804d-cc750be2e2f6.filesusr.com/ugd/6a22cb_abca331840e249cdb017d316de6d96a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vutame/free_printable_templates_for_retirement_party_invitations.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/82498562979.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_607fc2efa31446c9bec819e6e3d1ea22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zinudipir/rebatosorupusatar.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/90255732185.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_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 5344 bytes
SHA-256: f300d0e858cf41c2e217e38054158b995e4958b68c91801df0eb5b9d61489965
font_01_sfnt_off00010955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10955 11580 bytes
SHA-256: 791f3480f88bd7302254375cfe97a32fbc388db02493105ed1ec1dec9b5592b2

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