Malicious PDF — malware analysis report

Static analysis result for SHA-256 27f9c3641f1ec41d…

MALICIOUS

PDF

48.9 KB Created: 2020-10-04 09:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e02b9cda0a46472fb7de5092867b1702 SHA-1: 5cc2df24b8faa7b36f0a857f28d2b38c6b9e91ae SHA-256: 27f9c3641f1ec41d2056e3eaefd0732a9631497101ca92878e2221a93b74635c
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://gettraff.ru/strik?keyword=overstreet+comic+book+price+guide+on In PDF document text
    • http://files.katiehornphotography.com.au/uploads/1/3/0/8/130814245/9000118.pdfIn PDF document text
    • https://site-1037916.mozfiles.com/files/1037916/74995238288.pdfIn PDF document text
    • https://site-1037922.mozfiles.com/files/1037922/nexawijus.pdfIn PDF document text
    • https://site-1042585.mozfiles.com/files/1042585/zedumufasepebiwurotev.pdfIn PDF document text
    • https://site-1036925.mozfiles.com/files/1036925/dawanejikolid.pdfIn PDF document text
    • https://site-1038384.mozfiles.com/files/1038384/lozifilem.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4f7c4595-bbbf-414c-80f7-dc91040b5c0c/nepavigapitagat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ce524aa-51af-469a-a05b-ebdb518b6d16/8052488458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41f7fc71-83ab-4756-9502-6c2d00010ff1/87923720285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81c8c1f-63df-46b0-9d18-2603343aca00/wibosizuroka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53a4b1a1-0ab4-45bd-98ec-485636ddb5b3/35567436189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aad924e7-ebfe-490e-b58d-dfd22cd34dcc/zedutufitiditipe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2df203b6-4a6c-4943-83ea-7804ae221e0f/21455450800.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7E 5324 bytes
SHA-256: 6fdafc5d49b93065285af30fa2ec2d404eea7646d057d03d3aa2c9960643715b
font_01_sfnt_off00007d83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D83 13492 bytes
SHA-256: 8e071ce41903b99212881c1870078b286e613cc8006b24b33509c6b8f92fc3d6
font_02_sfnt_off0000a8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8CA 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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