Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4516d6c65a8567f…

MALICIOUS

PDF

56.6 KB Created: 2020-10-04 14:46:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 3e68d8f42b11396d5671bc1187a41afb SHA-1: 742fa386499b8bbe6ca269bc676c00d820591930 SHA-256: a4516d6c65a8567f9cef3cd0d6577896a55a3dcd6c8f10567cc7e952552c7dde
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=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2581%25D0%25B1%25D0%25BE%25D1%2580%25D0%25BD%25D0%25B8%25D0%25BA+%25D0%25B5%25D0%25B3%25D1%258D+%25D0%25BF%25D0%25BE+%25D0%25B1%25D0%25B8%25D0%25BE%25D0%25BB%25D0%25BE%25D0%25B3%25D0%25B8%25D0%25B8 In PDF document text
    • https://site-1039153.mozfiles.com/files/1039153/36288929237.pdfIn PDF document text
    • https://site-1043033.mozfiles.com/files/1043033/72557509175.pdfIn PDF document text
    • https://site-1038733.mozfiles.com/files/1038733/98758046877.pdfIn PDF document text
    • https://site-1037230.mozfiles.com/files/1037230/sofiwojivepedowegir.pdfIn PDF document text
    • http://files.windowtintoahu.com/uploads/1/3/0/7/130775209/9089707.pdfIn PDF document text
    • https://cctraff.ru/strik?keyword=%25D1%2581%25D0%25BA%25D0%25B0%25D1%2587%25D0%25B0%25D1%2582%25D1%258C+%25D1%2581%25D0%25B1%25D0%25BE%25D1%2580%25D0%25BD%25D0%25B8%25D0%25BA+%25D0%25B5%25D0%25B3%25D1%258D+%25D0%25BF%25D0%25BE+%25D0%25B1%25D0%25B8%25D0%25BE%25D0%25BB%25D0%25BE%25D0%25B3%25D0%25B8%25In 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/1/0484/4876/6117/files/99912973348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4417/0649/files/maxx_new_york_handbags_at_costco.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7804/2275/files/lennox_touchscreen_thermostat_installation_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9087/4020/files/malonisitikuxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/9341/1990/files/dilixopuzor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5753/2065/files/what_is_capitalism_yahoo_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1686/5952/files/hanover_area_school_district_superintendent.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6680/9765/files/kolexijisorifaguw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/9939/2674/files/jivonejel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000939a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x939A 5804 bytes
SHA-256: e51bfcb0cda563173226921d6f3de353a75cccf9dffd5c8e1081f6f0bb697733
font_01_sfnt_off0000a68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA68E 14180 bytes
SHA-256: cd97e9f2c654683f2f710a92d3f543ed7c05c15a18ccb541a28d0acf27165e3c

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