Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3cb2a6b0f5c1ba2…

MALICIOUS

PDF

49.1 KB Created: 2020-11-03 16:24:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a2d08e3cebc77e477eceecd32b212b54 SHA-1: 1ea2586ea949718df25cc04296f9d7aabd3e096e SHA-256: d3cb2a6b0f5c1ba2f5d8fe6bc9893f18d6d2c3ccd6e4fa6c9a1468dcb35f61d6
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.me/123?keyword=chapter+12+to+kill+a+mockingbird+theme In PDF document text
    • https://rowurasivove.weebly.com/uploads/1/3/4/3/134357219/tevonediwo_jowumidetodipo_juxedovelor_kevafevab.pdfIn PDF document text
    • https://tozupefiga.weebly.com/uploads/1/3/4/2/134265365/wekoxarin.pdfIn PDF document text
    • https://wifajeru.weebly.com/uploads/1/3/4/3/134342489/fumipilifesipo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/takateg/maths_optional_books_for_ias.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/gobosadufoxufasidevuperew.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/50034352151.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/adn_polimerasa_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d1d3f0-befb-48c3-b437-d0a29c6f39bb/xejaxisakugedeg.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/tara_westover_educated.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/96216452483.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/barivaladodibumadipebov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d96aeb48-b832-4bc2-af9a-770ac70fc684/97545765253.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/fejabebowuw.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_off000081e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81E2 5604 bytes
SHA-256: 9f436c927698f5055345b252dfc84a588e76a875ea3597d7bf0799af22439a00
font_01_sfnt_off000094ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BA 10148 bytes
SHA-256: d0933669808384f1775fd3e6f3cf1c107d40e1a3be8ce75c23d871d9b6252d92