Malicious PDF — malware analysis report

Static analysis result for SHA-256 f61032a067b1fb5f…

MALICIOUS

PDF

45.0 KB Created: 2020-11-08 19:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: b149083f873c3f3a036168abb4d54c54 SHA-1: 51218ab0ff65ae64c5e9e3a793ddd30d0b7d20e8 SHA-256: f61032a067b1fb5f5c08ce55e91ae28d08734467d6a4b9ecd4964a2419a01d0b
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://traffking.ru/aws?keyword=how+to+quote+a+play+title+in+mla In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f94caaaed10d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f874d1698f78.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://taretapu.files.wordpress.com/2020/11/minecraft_parkur_hayran_haritas_ind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/502fab9a-f6e3-4795-a2f1-c989589b7a01/adhere_in_a_sentence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30d318cb-7149-4ccd-b3a9-97a843aa47dc/66526196205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94f1a51-d3fe-4d81-9138-a3b349e237d2/fisojuwagisud.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/the_rise_of_nationalism_in_europe_notes_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b171e55-1b77-4109-b059-44b4f2decdbf/82235405240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09d5831f-b89e-483b-ba75-89ec72b06143/28965210932.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de73e49f-f44e-4d20-91dd-ff46fb6f014d/moxipobajodumuvajajipageb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d7cd9c9-977a-422f-bc86-28d3c9bf146d/ladunelodifopopiju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74bb1b92-e209-4bbc-99c7-59dfecd7d0e6/megaman_6_cheat_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a81c81ef-4701-401e-aace-2db48ce9979f/the_legend_of_zelda_level_3_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617d128a-02e8-4a38-a877-51476fa85b52/bedebig.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_off0000630e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630E 4856 bytes
SHA-256: c469f58c413f7fc73b3be07332d88ceefebe589e1cdad479532df52d3bb7ad15
font_01_sfnt_off00007396.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7396 11008 bytes
SHA-256: 14de66d0ffbc92382f40d6677eb37eeba9d185305db1380df2f82483f75a8850
font_02_sfnt_off00009911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9911 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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