Malicious PDF — malware analysis report

Static analysis result for SHA-256 673c68d32d66cde4…

MALICIOUS

PDF

71.6 KB Created: 2021-02-11 19:54:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: be6023e113a06daa720f9598d69839f7 SHA-1: ed6d68fd06d22ac362b3193142defbfe6d545a10 SHA-256: 673c68d32d66cde429afeff2ea535ffca496d7ae5f5e73509bce6245162c39f8
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://maypoin.ru/wix?keyword=google+number+generator+1-30 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380213/normal_6015eab6c0f59.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460447/normal_600586f9e02fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463002/normal_5ff32ac292568.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418777/normal_60099ceb6b897.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494139/normal_600632c4e2e06.pdfIn PDF document text
    • http://joblanc.xyz/75615807034vnoug.pdfIn PDF document text
    • https://zidovularirijap.weebly.com/uploads/1/3/4/7/134718784/160231.pdfIn PDF document text
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/zelumififodizox.pdfIn PDF document text
    • http://vafuvavepoti.22web.org/16813920779.pdfIn PDF document text
    • https://xapenivivafozeb.weebly.com/uploads/1/3/1/3/131379266/9d0ba.pdfIn PDF document text
    • https://gexurowi.weebly.com/uploads/1/3/4/5/134529019/5015001.pdfIn PDF document text
    • https://warexuzema.weebly.com/uploads/1/3/4/6/134601764/banewusex-lijiku.pdfIn PDF document text
    • http://parhelifrl.space/the_gilded_age_pbs_documentary_answer_keyuawiy.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/zubeziw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489050/normal_6012c6b76fd9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lamavij.epizy.com/7815502640.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_off0000d939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD939 5388 bytes
SHA-256: 7242cea145d1a26c25d1394407acf86fa0c77ab28b1809d8383687fd3f9b5848
font_01_sfnt_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 11216 bytes
SHA-256: f3416ebd6daed3bc4ad45dadc90da4f45c44031eb170d3dcab242165d1d78f0b

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