Malicious PDF — malware analysis report

Static analysis result for SHA-256 016e35f79070b130…

MALICIOUS

PDF

47.5 KB Created: 2020-10-13 22:35:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bf0eaeb9723136c28d4509fc9011930b SHA-1: 5222be61a25d7d0a4746e7d9a721861c7104121e SHA-256: 016e35f79070b130f9895923ff0111e6aebfad341ab565a589f1506e44698c4c
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://cctraff.ru/strik?keyword=perfumes+the+guide+2020+download In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/pokobu-pidoror-pekirez.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/3250b5961ed1.pdfIn PDF document text
    • https://site-1036751.mozfiles.com/files/1036751/60357557688.pdfIn PDF document text
    • https://site-1039830.mozfiles.com/files/1039830/favobewesojafuvox.pdfIn PDF document text
    • https://site-1037827.mozfiles.com/files/1037827/85038034532.pdfIn PDF document text
    • https://site-1036934.mozfiles.com/files/1036934/nedomifilizemogukuba.pdfIn PDF document text
    • https://site-1039694.mozfiles.com/files/1039694/72273842071.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/1/0479/2785/3223/files/zowivuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/6182/9528/files/kwame_nkrumah_neo_colonialism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0522/3327/files/kipefadapakekod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/28864321521.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5911/8229/files/witomakebiwosanusip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6533/0850/files/poultney_high_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0638/6595/files/disamitaxidaf.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_off0000797c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x797C 5688 bytes
SHA-256: e0443643e8727212176467fd45d19b03dc45bd3d516f4354756ebc74fb36cfe6
font_01_sfnt_off00008cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC0 10580 bytes
SHA-256: 67321565fd7b2228e4791c28aa2733d9160bfab99e4bdd8220e9be2d7512dd03

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