Malicious PDF — malware analysis report

Static analysis result for SHA-256 39897b51c2f56430…

MALICIOUS

PDF

64.6 KB Created: 2021-02-20 21:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b97581535de91bb615ddc65ec81eb860 SHA-1: 50e5053871300557f19d8fe1ab10ceb24e11bcef SHA-256: 39897b51c2f56430a122b7c6056db7920743f43a2f3f362c097e3761d214ebe0
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://leonvi.ru/wix?keyword=true+metrix+pro+glucose+meter+manual PDF link annotation
    • https://pinoxelu.weebly.com/uploads/1/3/4/1/134108818/8f48db3f4037.pdfIn PDF document text
    • https://kekorozonositen.weebly.com/uploads/1/3/2/7/132710750/pikamak-nasotalapadafag-wenubademogogo.pdfIn PDF document text
    • https://dukilasurijase.weebly.com/uploads/1/3/2/8/132815907/wofuvibo.pdfIn PDF document text
    • https://sowimarigakuni.weebly.com/uploads/1/3/4/7/134705136/nopafi.pdfIn PDF document text
    • https://sinonulu.weebly.com/uploads/1/3/4/6/134654736/guxidikotivo-romib-bodagekusulamed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487381/normal_6022d7d098bd9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483842/normal_5fe2474e17789.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/dapekufoxiraku/tazono.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/24709688706.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/youth_job_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/pokirexumapisozuwopimi.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/tiluxodofukazusakatevu.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/21351078669.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/sad_shayari_image_bengali.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_off0000c3fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3FD 5268 bytes
SHA-256: 95c21e3e4fa66db2c680b13d039b8355b24345b76c7dd31698a3327fa70ae797
font_01_sfnt_off0000d5df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DF 9348 bytes
SHA-256: 5d89de0ba89777bf1c29f4d6efda7295082351eb5531dca532067d6e0573a4f6