Malicious PDF — malware analysis report

Static analysis result for SHA-256 49e3868fd9b501cd…

MALICIOUS

PDF

39.6 KB Created: 2020-10-12 08:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 589cdf00e191278051efa7326ef080cb SHA-1: 621ce7478ceef1f20016f2f226c4420c4c80d79f SHA-256: 49e3868fd9b501cd94851f4f45a18fbfb3e1b4dc278046243d755905e8a91234
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=divinity+2+oranges In PDF document text
    • http://files.ontheroadwithrobert.com/uploads/1/3/1/3/131383549/57aaa014.pdfIn PDF document text
    • http://files.autmow.com/uploads/1/3/1/4/131452740/8831626.pdfIn PDF document text
    • http://xesowiral.unlimitedpotentialstl.com/uploads/1/3/0/7/130739094/lenefatiwoketowep.pdfIn PDF document text
    • https://site-1037033.mozfiles.com/files/1037033/guzajijoxujo.pdfIn PDF document text
    • https://site-1037212.mozfiles.com/files/1037212/44634363744.pdfIn PDF document text
    • https://site-1039702.mozfiles.com/files/1039702/80373425764.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/2364278150.pdfIn PDF document text
    • https://site-1042345.mozfiles.com/files/1042345/22253448309.pdfIn PDF document text
    • https://site-1040888.mozfiles.com/files/1040888/4965741334.pdfIn PDF document text
    • https://site-1039430.mozfiles.com/files/1039430/5857082675.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/1/0437/7578/7157/files/lefivexuwujikusakis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2632/5409/files/the_culinary_professional_study_guide_answers_chapter_7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3062/3894/files/photosynthesis_diagrams_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7171/9574/files/97806100509.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_off00005d4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D4E 5112 bytes
SHA-256: 96a9d94ff674150be8dbdb66a30cb4a437cc08436b909874a1c746595acc49a1
font_01_sfnt_off00006ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ED5 10324 bytes
SHA-256: 5b1f0d72a418d6e5d886564ce1e7c0ae36c0a48812813249b02cb5e425a4ccdf