Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b13171d0ea48737…

MALICIOUS

PDF

66.9 KB Created: 2021-02-25 08:57:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b058410aa81123865ec1daadcdde618e SHA-1: dc92b0f81f0717ae928dae4fb248424ace3746f9 SHA-256: 8b13171d0ea4873709665f7517aaab9d3ba9ccdb7e3b619332466346e0911c5d
126 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
  • 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.
  • 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/wix?keyword=attack+on+titan+art+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423430/normal_602ee77945134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_601ee38c5792a.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/ii8IDNb/child_care_assistance_louisiana.pdfIn PDF document text
    • http://ottics.ru/kevubuvemarug91c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_5ff7ad288bdb1.pdfIn PDF document text
    • https://vuzanodunujow.weebly.com/uploads/1/3/5/3/135350892/3445706.pdfIn PDF document text
    • https://ralerafuzirepob.weebly.com/uploads/1/3/4/3/134386916/koxefoji.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/70914060958.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ii7l4jj/99140327662.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/3ab0dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5ffcacc8999d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374359/normal_5ffd4cb435310.pdfIn PDF document text
    • https://mowasevibipogo.weebly.com/uploads/1/3/1/3/131379904/003b463d7.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_off0000cb06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB06 5132 bytes
SHA-256: 5ba0bb88b1b1d5f5c958a812a4aeb13b1dcf5857839676725f2e94d58c84a4d7
font_01_sfnt_off0000dc8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8B 10064 bytes
SHA-256: 37a176c3cdcf9d1384304aa177a16d1ca79b02116bc4f0dc5322b0064c35648d