Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbe8741760ec7d6e…

MALICIOUS

PDF

42.2 KB Created: 2020-09-30 05:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d14d5825091bfac6e34547873ce598a2 SHA-1: 7e4171b4116e928b2858027f6405038888fdf0b7 SHA-256: dbe8741760ec7d6eb316c069462fefd6ff7a34c9213773276f93644ae22c2f23
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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://gettraff.ru/strik?keyword=tax+amnesty+scheme+2018+ordinance+pdf In PDF document text
    • http://files.fairmounthardwarelumber.com/uploads/1/3/1/6/131606113/dureporadisigilute.pdfIn PDF document text
    • http://files.emsteps.com/uploads/1/3/0/7/130739699/borilagodi.pdfIn PDF document text
    • http://files.genxtraining.com/uploads/1/3/0/7/130739043/470d3d226c93a7e.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/gozenotalogewulis.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/73328399803.pdfIn PDF document text
    • https://site-1036982.mozfiles.com/files/1036982/suwibewinefora.pdfIn PDF document text
    • https://site-1037048.mozfiles.com/files/1037048/koserid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/17984806095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/25584806101.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/4030/9153/files/rupapepuvotub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/zusitewazibuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7431/3621/files/932250051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/bamamadamevurodoto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3699/0875/files/farewell_card_template_for_colleague_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0461/6912/9123/files/free_css_website_templates_photo_gallery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6687/4266/files/shadowing_n5.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_off000064f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 6000 bytes
SHA-256: a06888a655e576856d90f7eb091cab9b46f7a9637b0c556f9d821aed796f9eba
font_01_sfnt_off00007951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7951 9980 bytes
SHA-256: 41ab0af27ce5baad47b8d4797d1a3ddb4c7961c0220d0cbdcfbde27ea01561f2

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