Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2a679d89df621ab…

MALICIOUS

PDF

70.6 KB Created: 2021-02-28 22:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 2a522d4518ce778d03dfc7f8379d3cc8 SHA-1: 0e92b53be086504f8b21d3c932ae6cfb0212386c SHA-256: d2a679d89df621ab2b4660c52e3412f54479ddbb613975daece7854a84078cfd
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/award?keyword=what+are+the+most+beneficial+foods+to+eat PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411001/normal_600d430199e40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387813/normal_6008b463dd110.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/luromedipuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481072/normal_5fd18d6601f30.pdfIn PDF document text
    • https://bajipupetezin.weebly.com/uploads/1/3/5/3/135315063/subufonalojiwo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pazatirademe.rf.gd/12953014442.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/11139102789.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/registration_form_template_html5.pdfIn PDF document text
    • http://vexolofifete.atwebpages.com/71981933097.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/average_internet_speed_mbps.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/mubulava.pdfIn PDF document text
    • http://lufefavi.epizy.com/concise_amharic_dictionary.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_off0000d871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD871 5416 bytes
SHA-256: 999e8b2b4afdb8f3bcb1b17ab9253ece857b25a96f165ee47591b6f74e482d55
font_01_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 10292 bytes
SHA-256: fe06b543fc78eac00227ba18e19e4f0994fc34076b8cd77862db895da5244793