Malicious PDF — malware analysis report

Static analysis result for SHA-256 20a2c77f889924f7…

MALICIOUS

PDF

69.9 KB Created: 2021-01-29 18:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: bce47448b0feb92eb8ba351f2bdfee32 SHA-1: 166083fff70e54bc178922a8afa6e48736c685f5 SHA-256: 20a2c77f889924f7f8655a2b2ea69770f76661e4f5dd44555f58090143dbc252
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wb?keyword=watch%20youtube%20vr%20oculus%20rift PDF link annotation
    • https://cdn.sqhk.co/wekababu/iYNhbgi/personal_safety_alarms_for_seniors.pdfIn PDF document text
    • https://cdn.sqhk.co/dixejetafap/JzjeFia/zalanejuzadugemedeze.pdfIn PDF document text
    • https://werevofapopaja.weebly.com/uploads/1/3/4/4/134492388/6895895.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489850/normal_5ff342145b1a5.pdfIn PDF document text
    • https://vusubidasezojix.weebly.com/uploads/1/3/5/3/135399418/fusepaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_5fd76c5af2533.pdfIn PDF document text
    • https://roriwemako.weebly.com/uploads/1/3/4/5/134599113/2459157.pdfIn PDF document text
    • https://cdn.sqhk.co/tokarikadez/bUjgeuH/89925553884.pdfIn PDF document text
    • https://zekabijixakosu.weebly.com/uploads/1/3/0/8/130813896/eb481d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377933/normal_5ff681da3569c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5fe2c86e71644.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/email_form_html_bootstrap.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/livro_de_receitas_alimentao_saudavel.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/naxexirevudanaze.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/68949194072.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_off0000d46d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46D 5284 bytes
SHA-256: c878fbcb4ba1f87e72f668f13e9ddde6c164d9ae21c137cf065334bfc87bcb96
font_01_sfnt_off0000e678.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE678 11084 bytes
SHA-256: 8d771b3793be2ef3abdca02c2b2d584a4fa09d162f6abc7c3e9caa228e3f09fb