Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee08d2d0448f13f…

MALICIOUS

PDF

71.5 KB Created: 2021-02-24 15:17:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 9b2006e2832a75187295230d9a2bcf93 SHA-1: 1d785cb056afd46b50a237fc4b2dbef6f29b4bd8 SHA-256: 4ee08d2d0448f13fcec816fd70584233de879a4a3caee8ae09851a3684b9ec19
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://jottigo.ru/award?keyword=how+to+repair+sprinkler+system+backflow PDF link annotation
    • https://notebatamigoxaw.weebly.com/uploads/1/3/4/7/134715817/zezovalotajog_guwulurawef.pdfIn PDF document text
    • https://kolofajek.weebly.com/uploads/1/3/0/9/130969684/1118031.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/5014894.pdfIn PDF document text
    • https://fodigedij.weebly.com/uploads/1/3/2/7/132740281/silalijamibu.pdfIn PDF document text
    • https://tugalebuwe.weebly.com/uploads/1/3/4/0/134012885/2516430.pdfIn PDF document text
    • https://kusebavizekofuk.weebly.com/uploads/1/3/4/0/134098677/428739.pdfIn PDF document text
    • https://kavezebox.weebly.com/uploads/1/3/0/8/130814004/vawilukafi-loxovekimutula-fikelisobut-vazevap.pdfIn PDF document text
    • https://xinemituvirow.weebly.com/uploads/1/3/4/1/134108685/44428b8c.pdfIn PDF document text
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/kekugekajakidolu.pdfIn PDF document text
    • https://fimuxexepal.weebly.com/uploads/1/3/4/6/134615427/8881091.pdfIn PDF document text
    • https://fovubimosifiwu.weebly.com/uploads/1/3/4/3/134324820/8381629.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/sagotomagin/par_quoi_remplacer_la_maizena_dans_la_fondue.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/carpintaria_e_marcenaria.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/vilimutelorejegodedader.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/z87-prov_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/99018533915.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_off0000da9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9F 5520 bytes
SHA-256: 442d83f6ecb0bea3a3d47cadbdcaee935dc57251e100ccc91f2fab281b93b40a
font_01_sfnt_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 10504 bytes
SHA-256: becb6f988ed293c1e07888bf88ef66f3b5b08b4eb94a9c4b8f9f07fb797af354

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