Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc63550a1067c39b…

MALICIOUS

PDF

71.7 KB Created: 2021-02-24 09:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 71fe50c7c6d0766a49addf19f0b07399 SHA-1: d53ac5a84cbba97ac9fd962058976bfbf2858b17 SHA-256: dc63550a1067c39b3292163a3d1d8e2e15fa8f76857dbf2ff6fd23c2db2a3c60
186 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 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.
  • 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/wb?keyword=halo%20fall%20of%20reach%20comic%20espa%C3%B1ol%20descargar PDF link annotation
    • https://fetesebi.weebly.com/uploads/1/3/4/8/134896421/ranugizewibiki.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368251/normal_5ff30b7d66d62.pdfIn PDF document text
    • https://kefavobora.weebly.com/uploads/1/3/6/0/136010588/nofusomodepojomu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414336/normal_6016484142000.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/4040585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_600fc7208a46d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482619/normal_5ffae01444c7c.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/gxckxie/police_siren_light_and_sound_simulator_problems.pdfIn PDF document text
    • https://bezixaror.weebly.com/uploads/1/3/0/7/130739980/tonafedo-wokavalurusikot-xopopumi.pdfIn PDF document text
    • https://refanise.weebly.com/uploads/1/3/5/3/135389799/5252219.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/Hgfr7hj/father_and_son_pizza_chicago.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5fcb773c5e112.pdfIn PDF document text
    • https://wemawamirake.weebly.com/uploads/1/3/5/9/135959397/sozalixatedutob_divubujipolexi_dadisozejirano.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494432/normal_60153a440240a.pdfIn PDF document text
    • https://cdn.sqhk.co/nenafodud/gM3kO1f/buxosodosanilukinasaba.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_off0000d40d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD40D 5744 bytes
SHA-256: 903b00f23ddbf4fb7cd33b9dd53d38db09198a97370a35385c13269abf8f813e
font_01_sfnt_off0000e72c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72C 12628 bytes
SHA-256: 42549f27090e37f2f5921d61d23e39f773d4813277dc191c2d1debbf066e0cf2