Malicious PDF — malware analysis report

Static analysis result for SHA-256 98297a11695829c8…

MALICIOUS

PDF

72.1 KB Created: 2021-02-10 07:45:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 3c2beceb7fbc0f7414bf9992a8f00d5e SHA-1: b7049742a1c798ff55a3fb3ed2ab8d5217191ed1 SHA-256: 98297a11695829c8ac235fe84d49539487ec2a790a6aad36c087c11258f59d89
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=microsoft%20access%202016%20tutorial%20for%20beginners%20pdf PDF link annotation
    • https://jodegometokak.weebly.com/uploads/1/3/1/6/131606115/8826515.pdfIn PDF document text
    • https://judenebubiz.weebly.com/uploads/1/3/4/6/134656374/7478432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_5fd1f565d19d2.pdfIn PDF document text
    • https://tigakivukabor.weebly.com/uploads/1/3/1/1/131164093/74f97b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464070/normal_5fee1c96b8602.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465123/normal_5fcf76b6adb10.pdfIn PDF document text
    • http://mizolaresunade.iblogger.org/bavireli.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446400/normal_5fc6cb980ad18.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/sinadi/tidisizatubisolepuwovilu.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/white_dwarf_warhammer_40k_battle_report.pdfIn PDF document text
    • http://kisutajanarij.rf.gd/virubokigopuwafuvepid.pdfIn PDF document text
    • http://luderaguzafa.epizy.com/ketosis_diabetes.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/34433782499.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/rome_total_war_2_dacia_guide.pdfIn PDF document text
    • http://komujawabajufob.rf.gd/dokaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/get_list_of_worksheet_names_in_excel.pdfIn PDF document text
    • http://xogeguf.rf.gd/3_alif_lam_mim_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/60161189682.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_off0000d987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD987 5948 bytes
SHA-256: 5c57279186716a04ca28b80ca6a406a5482187cc0648aef311dec82d59031bab
font_01_sfnt_off0000edd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD7 11096 bytes
SHA-256: 79b3d62e6bbdd4abb0495f3454ed56c4623fb82c0d17bf0845952165fc4e3ba6

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