Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3a9d21556ab412…

MALICIOUS

PDF

46.9 KB Created: 2020-10-29 05:52:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-19
MD5: 7c69f6c844fa0e9a0496961477e6603d SHA-1: cf7f5f9a4ef4ec32a989cac711d9955790f8742c SHA-256: 4e3a9d21556ab412a13f194684b56e596388da1c875a2437c4215f301ecd6985
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/wb?keyword=civil%20service%20exam%202017%20reviewer%20with%20answer%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f8a0f65a5326.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5f8cc8c0b15ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f8cef270bda8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375886/normal_5f8ca378374ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369328/normal_5f8a856f5c341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_5f9893882ad9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366044/normal_5f9391aa98a8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386848/normal_5f923aba089d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f8b1f6e13c49.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/6432805.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_5f90d5c8c4c83.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/lotinumedamup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8745efc6536.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/sulusilalope-jobede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367667/normal_5f87602a612c3.pdfIn PDF document text
    • https://xepajozojiv.weebly.com/uploads/1/3/4/4/134476610/xurelif_sulobowenet_tunosovudizuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426090/normal_5f9865ba554c0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1229/5325/files/sakemubidedo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9784/0539/files/acrobat_reader_editor_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/37617483065.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/29716651071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/9366/8255/files/fluent_python_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/11158447505.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_off00006cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CBB 5928 bytes
SHA-256: cb60b5fd9de6b2a96e1ba7992341048c276a307e5d4bb7f5fd155c0d37381a22
font_01_sfnt_off000080e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E0 14132 bytes
SHA-256: 4f0f50a31c2697a192213efdfc606b770ebfeb299ed9a8414b4a5a17b6830695