Malicious PDF — malware analysis report

Static analysis result for SHA-256 13ea5cd0e5624f7e…

MALICIOUS

PDF

66.1 KB Created: 2021-02-17 09:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dfdf3beb9b8585f9828773fa371e8aa8 SHA-1: 92da3986cead2e98d17471ddd446bc857e2a1d47 SHA-256: 13ea5cd0e5624f7e0f3e1e8ec4bebf28b02a4b1dff45e4ed45d249c92079596d
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://jottigo.ru/wix?keyword=elvis+presley+here+comes+santa+claus+%2528down+santa+claus+lane%2529 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fcc0b8bd513a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487419/normal_5ff7aab729e9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5fcef4433666a.pdfIn PDF document text
    • https://kuvuwivozud.weebly.com/uploads/1/3/6/0/136091804/jadidumuzewuzuw-sapulizupo-silurotokexibu.pdfIn PDF document text
    • https://cdn.sqhk.co/texekikevow/heiiahf/bowling_king_cheats_deutsch.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/6659209.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/WqhdPhi/74273716357.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/hfNif7S/breakfast_buffet_ideas_pictures.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/jbjfWeT/teachers_desktop_grade_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445737/normal_5fd879a9a04b6.pdfIn PDF document text
    • https://pezomivagijo.weebly.com/uploads/1/3/5/3/135392772/tixotudibovu-gasevomewevu-vorode.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/jasipefulaxiduj/zisomasozebuzamedekanawew.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/braverats_regles.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/mekebizo.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/botw_2_information.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/9994800959.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_off0000c486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC486 5680 bytes
SHA-256: 4a569cbadf8a78109dbf987c14e2b9c706acd3418ea6695527ac7b35934e371e
font_01_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 10240 bytes
SHA-256: 49cd0a4a3f5aeb4c627ac96d2e6d9d325979ac9ae7148386a7d2aa4daf2d0fc4

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