Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c2227e2f528505…

MALICIOUS

PDF

38.0 KB Created: 2020-11-08 08:12:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 46ee13662b8519970426400feb939ade SHA-1: 544b54372f987f2b2e7a2f5b86ab7289a588f10d SHA-256: 77c2227e2f528505e23784b53ff04df5fa09fea0942fd9ac8ec5c1f4bfbf44f3
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://traffmen.ru/123?keyword=facebook+log+in In PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/b40a69b3810.pdfIn PDF document text
    • https://danenogamapan.weebly.com/uploads/1/3/4/4/134481258/rasakejidiwal-nativuf-miguminunam-wutidege.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f8709212abe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366406/normal_5f8ac13e507c1.pdfIn PDF document text
    • https://kawewadibuporak.weebly.com/uploads/1/3/4/3/134371142/0fb40e63156ae9.pdfIn PDF document text
    • https://fogiboxumejak.weebly.com/uploads/1/3/4/5/134518377/869acf3ee.pdfIn PDF document text
    • https://fuletufaxesuli.weebly.com/uploads/1/3/4/5/134523612/pivaxivu_nekugopef_vilefes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b453b16c-4215-43f1-a0f8-0258b756789c/73542691404.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4894e9-817a-4715-842d-9f713acb8f6f/vofaweno.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/advocare_24_day_challenge.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/david_graeber_anarchist_anthropology.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/76737130837.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/house_of_wolves_game_hacked.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/jar_jar_binks_famous_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d8a04b-4da6-4968-9924-bfb9e176bd83/31896822786.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_off000056f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56F4 4852 bytes
SHA-256: 9066b5539265fdabc934dccb1eecfa6e21175188a60a2d6ca0321cbe713d2efd
font_01_sfnt_off00006795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6795 10572 bytes
SHA-256: e9ffd8278779b173a3206e70702f301fd7f19b2da953f423a9921693eefb0f2f

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