Malicious PDF — malware analysis report

Static analysis result for SHA-256 7192179c4579993b…

MALICIOUS

PDF

42.4 KB Created: 2020-11-05 21:31:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3d5a0a81f8955008663e4f1208d9e6d7 SHA-1: 4d7a58f78b1521138bf73c8ea7151ad759a3a395 SHA-256: 7192179c4579993bc3fef3cbe26f8405e08f7323589cf04f3b4475770ab931fb
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://cctraff.ru/123?keyword=critter+love+sugar+glider+diet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380413/normal_5f97854a1c141.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379964/normal_5f8eb0beea1e7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_5f9af2498c6e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376371/normal_5f8ed17376869.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f98640716ffc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408009/normal_5f9419f7941ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393346/normal_5f962c4089b46.pdfIn PDF document text
    • https://tadadali.weebly.com/uploads/1/3/4/0/134095934/8077471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f9bb3cf361da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385009/normal_5f978382ab9c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/memul/94806116058.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/endometritis_treatment.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D3 4852 bytes
SHA-256: b4a50913170bf48e24a485fc011359114dc60ab1153f3304bc760eaaba203441
font_01_sfnt_off00006a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6F 10628 bytes
SHA-256: dd748447e4ae2e5fafa0d1a3ba3c2511f722dea4a51a7ac705fa0d75f411627d
font_02_sfnt_off00008ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED0 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333