Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a440adc2b66500…

MALICIOUS

PDF

61.2 KB Created: 2020-11-02 22:54:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 6d06c9ccaa1da100812d9a313bf82444 SHA-1: 81c63293f491345c8f1a2d758dec0c6d6f74ae03 SHA-256: 38a440adc2b66500fb7d4df2375836cf16570884a104f87ef567d245ae75d08f
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://ggtraff.ru/123?keyword=murakami+blind+willow+sleeping+woman+pdf In PDF document text
    • https://zitidatuviwe.weebly.com/uploads/1/3/4/4/134493200/dupevutasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_5f987b93bb6fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374956/normal_5f96cec995916.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391915/normal_5f9605048c4d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381543/normal_5f919ba0bd53a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f88cabaf0ac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426820/normal_5f9dd5be48a69.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/nofamanitigap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5f97dee37a7d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420775/normal_5f9926d7d4cf9.pdfIn PDF document text
    • https://nubagusajol.weebly.com/uploads/1/3/4/2/134235051/bibeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366015/normal_5f870b6915331.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374685/normal_5f8928ca9e6a5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000af26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF26 5664 bytes
SHA-256: e07df1b1cc553f92d31806e860df911e1006921cf713b8f5785404d0116d349a
font_01_sfnt_off0000c272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC272 10976 bytes
SHA-256: c92b4e252dcf562cd4d89d3cbe8d13068f04083320d4c5639112adb2b1f6d6dd