Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c7b26e8bf6fc33…

MALICIOUS

PDF

49.1 KB Created: 2020-11-09 05:51:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 608867d41ddbc3c0547b2411a31562d8 SHA-1: 3c60ad06132abc10abf42188ddd254312d27ac1f SHA-256: 61c7b26e8bf6fc339e6b53c9846b69ac6de4a075e84c9e3e87deef434128288b
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=barbados+white+pages In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445731/normal_5fa86eed3ac59.pdfIn PDF document text
    • https://seririgikum.weebly.com/uploads/1/3/0/7/130739922/10196.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8a5f7d17506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366360/normal_5f8723f6e7d0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443337/normal_5fa875674ab2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370073/normal_5f94593793e02.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/sivituxukaxatov.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/mahendra_bank_po_books.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/raxefulof.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/52548213713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8874831-58e3-4edb-bac8-c167673e4bb0/29838121428.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/25992301947.pdfIn PDF document text
    • https://mubabibaxoz.files.wordpress.com/2020/11/pebizotekapuroxubaje.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/personal_computer_definition.pdfIn PDF document text
    • https://fikujutedo.files.wordpress.com/2020/11/91824864407.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_off00008126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8126 5468 bytes
SHA-256: 39cffa1a558567e0a8b4d92e1a322ac1f6eb038d6155bfeec22ffe3677d3aaac
font_01_sfnt_off000093c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C2 10548 bytes
SHA-256: e7ba505ea8bad7653bc8fa0e065cc8f52574ba724b44ef8078d6d75beb8f1f09