Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ab51f36ed0ea494…

MALICIOUS

PDF

65.6 KB Created: 2021-02-07 11:13:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: cf3c63dd3aba4a9bf25fcb70934774f3 SHA-1: e9c21e2b6f158455713fdf87948ccfac13099151 SHA-256: 3ab51f36ed0ea494a0b855deb448732823ec03491c4c0dd943016bb4fe44cc90
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://leonvi.ru/123?utm_term=www+hjedesign+com PDF link annotation
    • http://osmosiotzs.fun/43160906131xpo0g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368466/normal_5fee3788dce03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370737/normal_6011b1ede6d91.pdfIn PDF document text
    • http://www-sfr-fr-monespace.com/autometrica_septiembre_20209xwxh.pdfIn PDF document text
    • http://aduo5.online/jay_z_vol_3m35vx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488815/normal_5fe15ebde1e90.pdfIn PDF document text
    • http://iglivesupportteam.com/37490265606la9wg.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/kotodur/supow.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/68729264283.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/oceania_marina_deck_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/worksheet_conditionals_mixed.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/79187299834.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/cancer_information_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/91768925427.pdfIn PDF document text
    • https://s3.amazonaws.com/ratixifo/2163872887.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_off0000c254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC254 5196 bytes
SHA-256: 4aca9191cbbe55b7eac28d867152996769c35236d13e95c848d2904fdda0cde0
font_01_sfnt_off0000d3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FF 10876 bytes
SHA-256: cf11850a593829bd4135556ebcc67b1853e11f35fc667c396d72fc7ab13d7d14