Malicious PDF — malware analysis report

Static analysis result for SHA-256 539e5a73620dec02…

MALICIOUS

PDF

76.9 KB Created: 2021-02-14 08:21:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 61e4a1c8da508160ab49f065c2781aaa SHA-1: 0418bd8f1d1f789844e7392f2df2e31cf8354b5b SHA-256: 539e5a73620dec022523b2833de6dc1e1f1c4c6c9c9e6ac31ba5a7ff75ed6074
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://druttle.ru/wb?keyword=f%20scott%20fitzgerald%20biography%20questions%20answers PDF link annotation
    • https://cdn.sqhk.co/mibemofega/hegjOjh/voxobovogetevik.pdfIn PDF document text
    • https://rigawegafo.weebly.com/uploads/1/3/4/5/134587157/e75bd9.pdfIn PDF document text
    • http://datinge.site/kasurimujifogewedepinosszmqu.pdfIn PDF document text
    • https://govoxarenaja.weebly.com/uploads/1/3/4/8/134874143/redag_lepeginiraregu.pdfIn PDF document text
    • https://cdn.sqhk.co/mixubiki/ejigihN/zobaxexagurago.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/geXbnia/13458184246.pdfIn PDF document text
    • http://joxoganatiwo.iblogger.org/9667478608.pdfIn PDF document text
    • https://cdn.sqhk.co/puburasar/DgdAHmx/56003032303.pdfIn PDF document text
    • https://vafabifagid.weebly.com/uploads/1/3/4/5/134583570/4ef63901.pdfIn PDF document text
    • https://cdn.sqhk.co/wopidevepip/Agg4ih8/44260108919.pdfIn PDF document text
    • https://cdn.sqhk.co/pufuxarabo/fhhgdJa/archer._io_tale_of_bow_arrow_apk.pdfIn PDF document text
    • http://gnfcns.info/hsbc_expat_explorer_report_2017zc3oi.pdfIn PDF document text
    • https://cdn.sqhk.co/jutafegobexe/ichbrhb/24684170062.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xegubidutanaza.epizy.com/61453218053.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/cronbach_s_alpha_reporting_apa.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_off0000ef8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 5880 bytes
SHA-256: e565c71f47dcc74142a006ec55fc8dbdaa78313df1f31edd07e67ee0a5e6b16f
font_01_sfnt_off000103a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 10188 bytes
SHA-256: f21bf4527c924fe67138f8b85b565168bed22d801ee149c68079e00c33bfc96b