Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe05c685003507e…

MALICIOUS

PDF

52.5 KB Created: 2020-11-02 07:01:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: eb0e8b893bf9aa6138562ec0b4e2d93c SHA-1: 4e1df69166b4b5a3991a093c000d4b089f27751c SHA-256: cfe05c685003507ea3dfc68eba69f72e49baaa21c5ab264cc3fe2cdf2410c29f
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=american+laser+center+nyc In PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/susikowupab-fuwoxenirige-viwirokarumalo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_5f8fa369a6de5.pdfIn PDF document text
    • https://talowitutujuf.weebly.com/uploads/1/3/3/9/133999148/e2795de444.pdfIn PDF document text
    • https://kanexala.weebly.com/uploads/1/3/4/3/134374151/difesizes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_5f92e04063122.pdfIn PDF document text
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/f16187.pdfIn PDF document text
    • https://kuzaloxamuw.weebly.com/uploads/1/3/1/4/131406684/wawukujebitit.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/a863a86c-403a-46cb-8eb3-38bbb2d73bb4/34580600786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/2722/9593/files/batowigirixuma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/0872/6427/files/pay_or_quit_notice_virginia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8947/0637/files/osha_construction_standards_1926.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8333/2772/files/93360092797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7630/2486/files/gujapud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a41172-85ad-4ce5-b26b-c7530ba0069a/jikoridewimikikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7236/3432/files/milkroot_cluster_ff14.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BC 4716 bytes
SHA-256: ab1e53750404fa988a418fc4a9554257206e2298d92c64bf13d54a124584cddb
font_01_sfnt_off0000798a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x798A 12272 bytes
SHA-256: da7bbd7df6e347d2dd0038381e844855e2580be4226a16181ef20d6cae9f35c1
font_02_sfnt_off0000a176.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA176 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67
font_03_sfnt_off0000b63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB63D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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