Malicious PDF — malware analysis report

Static analysis result for SHA-256 47926c35609b877f…

MALICIOUS

PDF

41.6 KB Created: 2020-10-09 10:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2b034a3c769487663c8abb59c01bf43a SHA-1: 633a053549531f3320f4c4862c7a53327d54741a SHA-256: 47926c35609b877f347436b915d722ef6d19e7087c49db0adce46afa1e7ba820
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/pify?keyword=aimko+7+quad+core+tablet+reviews In PDF document text
    • http://files.benjamincoldsaxophone.com/uploads/1/3/1/4/131408017/jedubodasi.pdfIn PDF document text
    • http://files.saikatahamed.com/uploads/1/3/2/8/132814935/cdf921671.pdfIn PDF document text
    • http://donura.cleansheetsmfg.com/uploads/1/3/2/7/132740763/mikivepow_welevutox_nedolida.pdfIn PDF document text
    • http://vabodezuz.manonvankempen.com/uploads/1/3/1/4/131437792/dimolovosiw-wifozow.pdfIn PDF document text
    • http://files.carriehutchinson.com/uploads/1/3/2/3/132302857/63972963c.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/536e5017-d363-429d-b225-b728ed229ef7/8439938707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23589150-8bd6-4ff8-a79c-d841207f43a4/sitaxezojijadekisel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fb97d6a-be34-43ab-9a56-965eb33bfaf4/dutovikulafuka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/255652d1-6908-4cd5-b522-1ba50aab2c1a/2817691207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09b4f065-ae7e-4014-b358-32047b0f7fff/refomakutazade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/318b693a-bf43-43a7-9827-00101ce64fcf/jozegituma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42d6cc0-ba30-44ef-bb0a-ebd14cf3583c/27779949274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e496a69e-e1aa-4fa8-a614-e77f06741a1f/xukovejexokumimikixo.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_off00006188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6188 5636 bytes
SHA-256: 7c129d106bfa1f8d366887658ec77392c2f5fd8a3ff21fcd7e378d4ddaf7dda9
font_01_sfnt_off000074b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B3 11100 bytes
SHA-256: ae35ac1b2379556d515d0bdaa4b388a3b859cfa1057ed5b1c1337a6ce56f12de

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