Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc380d3ddd96835…

MALICIOUS

PDF

72.1 KB Created: 2021-02-13 20:41:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: e96cce6cd81db20fc1c89bfbcf5664d1 SHA-1: 53bae7a8def0a0eacaa87398ead319bf18aba485 SHA-256: 6fc380d3ddd968353d62d80c9d90a2595507e062cd0e70c81db42dd52c174647
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=song%20basanta%20ese%20geche In PDF document text
    • https://wedutigumufezeb.weebly.com/uploads/1/3/4/6/134659425/mavudakawemub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_60224dc674f16.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/df9db.pdfIn PDF document text
    • http://nubigawe.22web.org/netesugojinuzute.pdfIn PDF document text
    • http://scrlt.xyz/financial_accounting_kimmel_7th_editeoxrb.pdfIn PDF document text
    • http://jerunurijo.iblogger.org/student_artist_statement_template.pdfIn PDF document text
    • http://nebolitazezo.iblogger.org/97274293933.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489058/normal_5fe3aa01036d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_5fd3146aba30b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391315/normal_601b3b6e58d28.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/gabugup-zomewerij-vizoduxasog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_601d13cea7eae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_6006daf611e05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://didazejitikav.rf.gd/34147255593.pdfIn PDF document text
    • http://jisixapuwalim.epizy.com/vajix.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_off0000dd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD96 5176 bytes
SHA-256: 146b4d56f10d7fd1dc0bc3f9338ca55d1cb0be69368ce066ca21610815049208
font_01_sfnt_off0000ef34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF34 10676 bytes
SHA-256: f0fd18d8863cf5059aa6621bbbd0e945a44682fc7077470d87f40d122c1d2f9d