Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd600762199ad5f…

MALICIOUS

PDF

70.5 KB Created: 2021-02-15 21:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: af34fefa2fcbcb9388b957dd4f4e96f2 SHA-1: 46bc5a924c42eabd95f6ee2baa64b3ff1ad905e9 SHA-256: fbd600762199ad5f66738bf4c42524e784e1d5822614c93b55b4644a1312273b
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://crophysi.ru/wix?keyword=royal+rumble+2020 In PDF document text
    • https://pulijapejupexeb.weebly.com/uploads/1/3/4/0/134041872/02cddca6dccab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5fe83ad9d6840.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450719/normal_5ff149c5a3ba0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_5fd9268a0fe45.pdfIn PDF document text
    • http://laura-egorova.ru/putobudoh4wux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416930/normal_6028f232502b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467564/normal_6022ffd8aac1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463824/normal_5fd704b51562e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488555/normal_5fd79b1f6661e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416672/normal_5fdc1884cbb4a.pdfIn PDF document text
    • https://jadufebifov.weebly.com/uploads/1/3/4/6/134627690/9b41756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_60143c1b557fd.pdfIn PDF document text
    • https://vojituletakez.weebly.com/uploads/1/3/0/8/130874409/pikogub.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/magefad0llgy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459631/normal_6009655212d11.pdfIn PDF document text
    • https://guwemegarorara.weebly.com/uploads/1/3/4/3/134353603/2488020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488130/normal_5fde650eb7676.pdfIn PDF document text
    • http://bilkan.fun/nerowotilafqwh42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420459/normal_6028e7111044f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d92d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92D 5176 bytes
SHA-256: 198fc8459f9abb4ff5122755794e37a288a7b0d10333752bebc386b0e9f3f49c
font_01_sfnt_off0000eab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB8 9912 bytes
SHA-256: 85778cf2de874b0e5f0daa8ca35378ad878337f31ff71fe3619474ff6ab31ed5

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