Malicious PDF — malware analysis report

Static analysis result for SHA-256 da44633ba17a3541…

MALICIOUS

PDF

40.2 KB Created: 2020-10-03 18:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 5831eda7220677fc13028cc232bcade4 SHA-1: e13d3488fb4dbd1a264daebc1ca3a95d79ea84ee SHA-256: da44633ba17a35415d4197fcf418bc0b89bbe4b15364b23dce0909f0e355b5e8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=plan+de+compensacion+amway In PDF document text
    • http://surosajiz.doeeme.com/uploads/1/3/1/3/131397970/xamukedugokofap-samumarotasesi.pdfIn PDF document text
    • http://files.sacramentomedicalspa.com/uploads/1/3/0/7/130739603/c32687d0.pdfIn PDF document text
    • http://files.piernetwork.org/uploads/1/3/0/7/130775653/godevaledut.pdfIn PDF document text
    • http://dufisid.smsukltd.co.uk/uploads/1/3/1/6/131636960/pezuzuj.pdfIn PDF document text
    • https://site-1038529.mozfiles.com/files/1038529/wolovawigugu.pdfIn PDF document text
    • https://site-1040898.mozfiles.com/files/1040898/kazalisufigomudeteded.pdfIn PDF document text
    • http://meleroluf.barringtonih.com/uploads/1/3/1/4/131453133/xokilavo-zogode-xajameku.pdfIn PDF document text
    • http://files.importdollscarclub.com/uploads/1/3/1/4/131453060/ebf93.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/4924/2783/files/22783928393.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/8811/0502/files/41039533499.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9336/7710/files/99708606694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/28307713527.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_off00005f09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F09 5316 bytes
SHA-256: 03b97e16da4ca9874c47535b2ed150b1ce4f15dc1dfb1642362914b19d8395b4
font_01_sfnt_off00007125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7125 10364 bytes
SHA-256: e0900fa1ffabd9fcdb87a842ed73fc9e7b511eb02c638279b7248021ced9c12a