Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b405a078efb1b9…

MALICIOUS

PDF

71.0 KB Created: 2021-03-06 14:35:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 65d9fde6ce325fa819a8f156b2bddccf SHA-1: 1926dd10dc5ad0ed433cdbbcba5cc88c907b5c34 SHA-256: a7b405a078efb1b9175465273db1740e9026e4f614035c40c4bb5e057573ed5b
186 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pelibifir.ru/award?keyword=python+programming+audio+books+free+download PDF link annotation
    • https://tumupapixukuju.weebly.com/uploads/1/3/4/8/134852222/164b7e687b66.pdfIn PDF document text
    • https://lumixomenuvaw.weebly.com/uploads/1/3/4/7/134745504/kuvuxog.pdfIn PDF document text
    • https://jotowaviroretog.weebly.com/uploads/1/3/4/6/134604658/bunogo_kamiva.pdfIn PDF document text
    • http://pefiworawodud.mypressonline.com/parent_info_sheet_for_teachers.pdfIn PDF document text
    • https://xuxasogunoniku.weebly.com/uploads/1/3/1/8/131856570/taxakalibapi.pdfIn PDF document text
    • https://duwifugikez.weebly.com/uploads/1/3/5/3/135351140/fazukuke.pdfIn PDF document text
    • https://jotozured.weebly.com/uploads/1/3/4/5/134588142/nonofojumi-kapojadamu.pdfIn PDF document text
    • https://zeduxuvanoripi.weebly.com/uploads/1/3/0/7/130775880/tijogasile-jufax-lusave-xugubonu.pdfIn PDF document text
    • https://fadegedisumobe.weebly.com/uploads/1/3/5/9/135992854/ee2b448d04.pdfIn PDF document text
    • https://serewutedirafam.weebly.com/uploads/1/3/5/3/135339767/rajunumem-faxelej.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/levumoduf/73378968877.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/27245515846.pdfIn PDF document text
    • http://gizexagivet.rf.gd/standard__poors_industry_surveys_file_for_the_beverage_industry.pdfIn PDF document text
    • http://tiwatimab.atwebpages.com/tozivi.pdfIn PDF document text
    • http://jalameki.epizy.com/manualidades_navideas_2018_con_moldes.pdfIn PDF document text
    • http://joxisuzu.rf.gd/veximiwuduxikero.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/corrugated_steel_cladding_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/lujuxepixuxurupizinazak.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_off0000d69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69B 5856 bytes
SHA-256: 0fd3f19d3ee29185f38ef898d93a514bdd1c36500ff38312b686cb9612d83891
font_01_sfnt_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 10792 bytes
SHA-256: 53a915a0365efd11ab728189658208ed82b488799253606d6eb06f5ecd8ac8c0

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