Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec7074e23d11cdf…

MALICIOUS

PDF

45.3 KB Created: 2020-08-24 05:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3357275cd089810f7e6f6e2eba1a483a SHA-1: 3077784fb7e39403582689ae4f6bc6899cdfcf24 SHA-256: eec7074e23d11cdf16e39759f7dfc321c198a1feab8a732e9730849e708eb3eb
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://ttraff.com/pify?keyword=vlookup+multiple+values+from+different+sheets In PDF document text
    • http://kaweb.bettyscountrykitchen.com/uploads/1/3/1/0/131070450/jumij.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/1/0434/5213/7622/files/jilesuvepexagetevivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8721/7311/files/79401201646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3290/2806/files/27339560549.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9917/6612/files/xugidusinixatepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1540/4695/files/ranasogegevopupodoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/spoken_poetry_tagalog_about_love.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4261/9035/files/wemixukirupobe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/baludugosutagaxoreforodul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0060/1504/files/57562272539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/4213/8262/files/nivazawumebizefagus.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_off0000729f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 5368 bytes
SHA-256: 6a48c7f8f9e6ff947b51c18e8fb7847b7b57ea362268b4dbf5ff86be860a79a2
font_01_sfnt_off000084bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BD 10396 bytes
SHA-256: 97dcfd76f4c1552256fbdd0a88710fba902d736fc7b08e360691d2cd335816c0

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