Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c030428ef336958…

MALICIOUS

PDF

42.9 KB Created: 2020-11-02 17:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: cd399ad50f32ac861687331ab6bd0433 SHA-1: 20c0975fa51b86ed3202ef83fcf34b9a11c430d7 SHA-256: 1c030428ef336958859f3ccd396c5e827d82928a49a6117655067b5f3b06e49c
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=sites+like+youtube+uk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371799/normal_5f9966a99aa57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_5f9d9bd3bcfa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_5f93c6b32dda2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375340/normal_5f8c5d7e83edb.pdfIn PDF document text
    • https://ruxodinari.weebly.com/uploads/1/3/4/3/134377607/wajumadoj.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/batoragubukepo/wakadarukadomit.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/life_after_apk__obb_highly_compressed.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/gelatevopumesukijow.pdfIn PDF document text
    • https://s3.amazonaws.com/wunojipu/atlas_of_medical_microbiology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60635ab5-a6bc-4809-bf20-c4c5eb4df835/56467961390.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/el_arbol_del_conocimiento_resumen_por_capitulos.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/are_humans_archaea_or_eukarya.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_off00006b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1B 4780 bytes
SHA-256: 13a027d9a821778cf36630cd74bf589b75021bcbf82bf91771051ccf9708707c
font_01_sfnt_off00007b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7D 10568 bytes
SHA-256: 0a9e629a4bed947272e51f2c3e6ecbf5d1da35b631c6df41aed741112d4f44eb