Malicious PDF — malware analysis report

Static analysis result for SHA-256 041bf397a66b9d97…

MALICIOUS

PDF

37.9 KB Created: 2020-10-01 09:49:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 30b109eb8de8c1e738ed127c2a2a42e7 SHA-1: e9d0ef1200dc0baf3d3a83ff5d3d3df6091dd6ee SHA-256: 041bf397a66b9d9751d9884320721ade4b8f45f2d2daaf8f2b1116eb1cb63250
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://gettraff.ru/strik?keyword=beckwith+early+christian+and+byzantine+art+pdf In PDF document text
    • http://kusife.sicksticksgolf.com/uploads/1/3/1/4/131483154/kabepixato.pdfIn PDF document text
    • http://files.whitecloudsweb.com/uploads/1/3/0/9/130968915/d4ac5c63.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94a7d084-5225-4636-acd6-1e94ec7deba5/18518122401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0bda93-ba53-4d3e-8a64-97cc15672118/zupujerosoxavaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fbaa7fa-4085-403a-98d2-31d48b3cc8cb/kaguzorurojugatusonavidot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dc06b4c-fb0a-4853-85a2-fe68abaf1e00/69592555154.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0458/0956/5862/files/army_ncoer_support_form_character_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/48333860620.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4682/0245/files/bolt_grade_markings_and_strength_cha.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5441/3462/files/ajay_kumar_singh_english_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9f4992c-eac2-4379-9594-75e3f8cb7e2d/busogezopetasemuwunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa1decf8-cbea-411a-9580-b1ffb528a556/34271045750.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a1834aa-8160-4dba-874d-424c4cb59c23/46081684523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17fe7cb4-491d-473e-9794-4c0fa9e91305/ravelipajetuxawegi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6382d760-dd03-4758-8234-3fecda4ebf46/62924072658.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_off00005530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5530 5740 bytes
SHA-256: 164a354c69fdac26408892334f7e9956fd3de0d28cdcb7ff062bf9b4a15d6e4a
font_01_sfnt_off000068d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68D5 9860 bytes
SHA-256: 5c56065ded01245714e47eedd13ef46dba5426ec681e5f45fd830d622ce00393

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