Malicious PDF — malware analysis report

Static analysis result for SHA-256 e136e55e3d51de3f…

MALICIOUS

PDF

48.0 KB Created: 2020-11-04 02:48:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 15ba9f093716fb7eae0d94361398c324 SHA-1: e86d470e3becb0dd2248e9db07e7c47f5636c2d9 SHA-256: e136e55e3d51de3f44a1c65cd90bdd2bcc3ce06705896c5f2a5b9075f42ab303
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://ttraff.me/123?keyword=thepiratebay+proxy+list+2020 In PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/1349699.pdfIn PDF document text
    • https://winimotewo.weebly.com/uploads/1/3/4/5/134593518/tiwepozeraji.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/xufofurusosava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427785/normal_5f9bc46f0a6ce.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/130b59d385af1c.pdfIn PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/779ebd13070d.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/e4ba97c0-993c-45a4-a48f-cca9a60685f6/xikufak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09996502-53b4-4d49-af93-25ae5eab3501/dezuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a896eb0-88a5-4260-88cd-7ab15fc3fef0/gracie_combatives_36_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a989192f-329b-46aa-b7b0-d2d971305362/the_legend_of_zelda_the_minish_cap_rom_hack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa68e317-405d-4b52-ad42-ccb939360655/78613379201.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/191d0a57-cdb1-41f2-8540-f99fd8e2eb99/pijomarumovurik.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_off00007c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C84 5440 bytes
SHA-256: 478a90aa553e5452166ee476a6242f6801dcf6223a3a06f519d237fc0413752e
font_01_sfnt_off00008f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F00 10584 bytes
SHA-256: 6aeecbbb27ab1a5670654353b37e5424c15e4b7e980a355e0032dcd9034b8fa9