Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c0d4598a5fe3cd…

MALICIOUS

PDF

70.0 KB Created: 2021-01-24 15:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 88a1a6374c9c3fe94a9f065c2d6bc834 SHA-1: 180e14cf0c7c41194cad5797d74c51d62e7aec93 SHA-256: 71c0d4598a5fe3cd644cba33dcdc7dcfcacf068ab154f32f9ee479e88088a36e
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://baarspo.ru/aws?utm_term=libreoffice+writer+table+templates PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4382627/normal_5fed8f78ed02c.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/iaibhaf/xoxopoborade.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5ff4a2ca2cc03.pdfIn PDF document text
    • https://cdn.sqhk.co/jukelifawap/f04ighg/81942358944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_600283741fb6c.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/gidenazelujagawin.pdfIn PDF document text
    • https://xiluxobafuju.weebly.com/uploads/1/3/5/3/135323992/xolaxoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393220/normal_600747a165202.pdfIn PDF document text
    • https://cdn.sqhk.co/xasakeza/heFpght/bigijeben.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pepajefosub.epizy.com/asymmetric_information_leads_to_adverse_selection.pdfIn PDF document text
    • http://tuvugerij.rf.gd/26388586385.pdfIn PDF document text
    • http://pomigipasa.epizy.com/28905232390.pdfIn PDF document text
    • http://datidogebe.epizy.com/anvisa_brazil_guidelines.pdfIn PDF document text
    • http://xazomagojuwa.epizy.com/livro_cntico_dos_cnticos_em.pdfIn PDF document text
    • http://dawutanarav.epizy.com/fivalonazuj.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_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 5336 bytes
SHA-256: 104fb95eb2bd016372bb56248dc82abbfc7f40bf77e36e03ac76173155266cb4
font_01_sfnt_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 11144 bytes
SHA-256: bbb9da810dfaf9f1df07e4d2638d31afb0ee67633b9c3b6c8e31bb5fc4e11c98