Malicious PDF — malware analysis report

Static analysis result for SHA-256 690e773f141dff8b…

MALICIOUS

PDF

42.9 KB Created: 2020-10-03 08:46:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c6c067a105f379f79c31d5790fba1f09 SHA-1: 403b06bd8a1b67fe66774386ca4856eb6c2a00c5 SHA-256: 690e773f141dff8bb61bae07b7f35737bf1c7da9f401ab6ed0d4860f0930332e
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=pastor+chris+oyakhilome+books+pdf In PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/kanopi.pdfIn PDF document text
    • https://site-1042892.mozfiles.com/files/1042892/papuseragagobegitajigux.pdfIn PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/4912495040.pdfIn PDF document text
    • http://fiter.texasredbuddental.com/uploads/1/3/1/4/131453206/7791007.pdfIn PDF document text
    • http://rovujo.mysje.org/uploads/1/3/2/7/132740267/biguwokep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5916d1d7-f79f-4e0e-8bc0-8bbdfb567906/73049773008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/795e3d35-dd1f-4280-8c56-4b48d837cb26/vikufezeliju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dddaea7-4dae-4c97-b1f1-1c22e7ddbd4e/makomofawawewodajakig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d979623f-69d8-4851-868b-e95479f89c4e/jixokolubanuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453fbfdb-018c-47b3-ae05-94f9cdf09d2b/vikuwewar.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_off000068f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F1 5700 bytes
SHA-256: 3a7f29d097887838d34269338106fff1695e514afc3c94ee767d8efb7cbc861b
font_01_sfnt_off00007c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2F 10156 bytes
SHA-256: e3e83412acc10fc95f301bc225fb28b0b08892bcb643d7f34d1885d775f59c59

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