Malicious PDF — malware analysis report

Static analysis result for SHA-256 f035d7a2ed63facd…

MALICIOUS

PDF

34.3 KB Created: 2020-11-09 16:32:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: dbd8f204bea84ffdc3131af763eda5e4 SHA-1: cf834f3f15cf4848844d857b583251aa2c208a61 SHA-256: f035d7a2ed63facda578038b9ce5fbe0660795965d8676dc7a975a2391f7eeec
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?keyword=nest+user+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4410986/normal_5f968f429e498.pdfIn PDF document text
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/zegemet-foronivosuragu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407813/normal_5f99bd5cb4324.pdfIn PDF document text
    • https://mubuwejazanewa.weebly.com/uploads/1/3/4/5/134585617/susibixibovipoz_xuxosinotubo_wovabof_wedanuvu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369782/normal_5f888cd0e0e27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366366/normal_5f8713d264aa3.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/zuguvoxoki/luzaneboxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64d7a407-9b39-4ce4-ada2-ee5a7e08723a/ravajud.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/presto_fry_daddy_elite_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/pufobidu.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_off00004ec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EC1 4800 bytes
SHA-256: 00fd93faf724969df792180a2c56141b58d44baadf7591f5cea097c5860d3a33
font_01_sfnt_off00005ef3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF3 8820 bytes
SHA-256: 46575c549e8aa3dc87f0e91247980783af2abe4ca934bd3d0247187cf88a67f3

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