Malicious PDF — malware analysis report

Static analysis result for SHA-256 7efeec97821a4561…

MALICIOUS

PDF

67.9 KB Created: 2021-02-15 08:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: be8836525108f6b3cb073e87e5d32b3d SHA-1: d268d9c30251a914b4c5577ec5e84b1f75d2a8eb SHA-256: 7efeec97821a456107a12d6b914b68c5d9f6285d178a1ee8abc7d796a5341ac2
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://seumenha.ru/aws?utm_term=export+outlook+2010+calendar+to+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4489057/normal_5fc87ba38353d.pdfIn PDF document text
    • http://sesopob.iblogger.org/sheets_for_ingenuity_bassinet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417030/normal_5fda732943447.pdfIn PDF document text
    • http://masimepipet.22web.org/cerebral_oedema_management_guidelines.pdfIn PDF document text
    • https://tuxakosubulep.weebly.com/uploads/1/3/4/0/134012578/jovoz_gufewasagibi_kaworenamoxofuv_ripagusiviva.pdfIn PDF document text
    • https://cdn.sqhk.co/zesonixiv/nheMhcy/musekesudezuxiwopuporif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465557/normal_600b2745eba6d.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/Lwjahhw/22684812259.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/i5ohaij/jikasisuvaridujiz.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/wovugi/kebokenalosu.pdfIn PDF document text
    • http://jasigobup.epizy.com/limite_de_coliformes_totais_em_alimentos.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/vocabulary_for_ielts_speaking.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/31121703408.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/65553519873.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/81946607775.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_off0000cc80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC80 5388 bytes
SHA-256: 913516ea5cc3e12402c85315ee1286287159f9551e98fdacc02c7eb82048b476
font_01_sfnt_off0000def2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF2 10404 bytes
SHA-256: 7e1096f22dbcfddcf842dfacafd8064d3c9cb93e51521a89cc2f4d1b4e8464ed