Malicious PDF — malware analysis report

Static analysis result for SHA-256 d14e13492913af9a…

MALICIOUS

PDF

42.0 KB Created: 2020-10-10 19:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4989b0e32c3b6289985ce6fd60a30866 SHA-1: 3669c13ac2fea190b1c89dcfeedd2665b2f4d6a3 SHA-256: d14e13492913af9af318b582c65590d55d69a8cba8ceb536176f903ad4d7249b
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=clinical+anatomy+and+physiology+of+the+visual+system+remington+pdf In PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/60801825491.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/62547570101.pdfIn PDF document text
    • https://site-1043803.mozfiles.com/files/1043803/46888019021.pdfIn PDF document text
    • http://files.electivese.nl/uploads/1/3/1/3/131380845/d2672d439.pdfIn PDF document text
    • http://files.yamw.org/uploads/1/3/1/4/131406558/9692260.pdfIn PDF document text
    • http://files.the-beaver-house.com/uploads/1/3/1/4/131437409/2219233.pdfIn PDF document text
    • http://files.dannguyenportfolio.com/uploads/1/3/2/3/132302978/46da566.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/1/0440/6951/9510/files/74457002920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1984/5278/files/90558491590.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4584/1827/files/mario_bros_crossover_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1798/4410/files/politically_incorrect_military_t-shirts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6979/2678/files/nugupuxufewijotuwemevuv.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_off00006537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 5636 bytes
SHA-256: 379e7b836096658bc89ad9418d39f7a47ff054d211666b0b1dd2032807d22df3
font_01_sfnt_off0000783b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x783B 10024 bytes
SHA-256: 8be8e31dcb10cd2f9fa76618679c8a552ccea8915cadfaf523f6fb355a34ffc9