Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b3628d1bce8b6a…

MALICIOUS

PDF

43.0 KB Created: 2020-11-06 00:03:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a35ccb7bedec995a368e962871051595 SHA-1: 63cd364c98a454ee3daeb8ccabe68477edeb5dd4 SHA-256: e1b3628d1bce8b6adac4e825b75b18a6747264ff7257b590c66bde4b673756c0
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://traffking.ru/aws?keyword=minecraft+chicken+mod+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408995/normal_5f968631166f5.pdfIn PDF document text
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/075d3a8173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_5fa26622a6d8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f886c2232bdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380691/normal_5f9b16e030b72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f8c75c66dbdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f870377df9b9.pdfIn PDF document text
    • https://mutodebubopuvom.weebly.com/uploads/1/3/4/3/134373551/5607708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f9a6a9b33092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375361/normal_5f9f0264c1c06.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/20d94591-2782-4faf-b28c-29801f2fd75f/bakepodetoverixizobapali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04b14b8a-833e-4bb4-a0d4-393c81315d46/bigukalisibokedin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bab20ad-44a6-47d1-858f-e475a7ed5898/harry_potter_catholic_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/ruvexevagujiporetupagi.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_off00006a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 5292 bytes
SHA-256: 35128c822b9fd15ba5a18a313a77ab6437b300aa61a7b721537ef64cc99d33ad
font_01_sfnt_off00007c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C69 10204 bytes
SHA-256: 38dd63ed39e4f852f83b6516ab788bd1ddf7c0dcd117dcb2fef4a8ba2650eedc

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