Malicious PDF — malware analysis report

Static analysis result for SHA-256 c307739f1af8809f…

MALICIOUS

PDF

73.5 KB Created: 2021-02-01 08:45:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: f3b1c8cddf93c6bce1216bd6d84309d6 SHA-1: 5e6a67bb15363b8a7808fd13428988303fa3a995 SHA-256: c307739f1af8809fac949da992564a2e214377f8fd559d2d863bdeade037f20a
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://baarspo.ru/123?utm_term=nj+police+and+fire+pension+mbos PDF link annotation
    • https://sutapupimode.weebly.com/uploads/1/3/4/6/134615637/venivamow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368481/normal_5fc885fe713d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382790/normal_5ff8caf74780c.pdfIn PDF document text
    • https://xizenebijebis.weebly.com/uploads/1/3/2/3/132303300/fuwejanarezisu.pdfIn PDF document text
    • https://gaditefu.weebly.com/uploads/1/3/2/7/132712385/3854271.pdfIn PDF document text
    • https://cdn.sqhk.co/finulepaf/ggLFijR/mokovi.pdfIn PDF document text
    • https://vugawijop.weebly.com/uploads/1/3/4/5/134594760/ruboziwaxak_silumuna.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369766/normal_5fe4c8d3628a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392207/normal_60013bda62b83.pdfIn PDF document text
    • https://mepanomelisegil.weebly.com/uploads/1/3/4/8/134899905/968724.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485930/normal_5ff02c327bb28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478716/normal_5ff9538bb90f0.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/e17c7.pdfIn PDF document text
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/8952776.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kupavojos.epizy.com/salesforce_workbench_date_format.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_off0000df88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF88 5484 bytes
SHA-256: 368613d446d7157f6b1e7dc828d26c966c41acba37897636d3062e09a63f463d
font_01_sfnt_off0000f223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF223 11012 bytes
SHA-256: 1a8c650d7cadb542bfc7fce1bfeee1f7217026cc8f4a4afd1241a9e6fbb91e6e