Malicious PDF — malware analysis report

Static analysis result for SHA-256 3333349f2f37e4d4…

MALICIOUS

PDF

71.8 KB Created: 2021-02-07 21:48:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 36cbe63489fe9fa7b52f1925a5a498e2 SHA-1: d7eb5cb646c4c40ca6b1ddff2b7e432324e532b5 SHA-256: 3333349f2f37e4d419855fecf62480537c19fe3ce059e55b3c1ba1ae00ad1996
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://yafferge.ru/wb?keyword=dunnington%20primary%20school%20ofsted%20report In PDF document text
    • https://cdn.sqhk.co/kitujesijak/1Hwksgi/rta_audio_analyzer_gratis_para_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416934/normal_601495880e3a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457011/normal_5fdd6ca5332aa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403259/normal_5fcbb2bf4fd25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469824/normal_5fd967823fe20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408172/normal_5fce1800a64e4.pdfIn PDF document text
    • https://vefapabawi.weebly.com/uploads/1/3/0/7/130740427/2193958.pdfIn PDF document text
    • https://vebilikowuti.weebly.com/uploads/1/3/2/7/132740371/c2bee2.pdfIn PDF document text
    • https://narodejezagog.weebly.com/uploads/1/3/3/9/133988416/7426287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419832/normal_60196ab5606ea.pdfIn PDF document text
    • http://lefenup.22web.org/17489774078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472216/normal_5fff32f0659e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_601c7db4c931d.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/Ggcii9f/dj_song_name_mixer_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vipowiso.epizy.com/zuxazemozafi.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_off0000d927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD927 5672 bytes
SHA-256: 5c23377d020b152dcf426bb245abe452939b8bf798d7c644d8c4fd6667a531a4
font_01_sfnt_off0000ec56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC56 11212 bytes
SHA-256: cdea0f2daea3fa9d963468a8a4a2d82723ad69b73c345460aa689c8f46e55f97