Malicious PDF — malware analysis report

Static analysis result for SHA-256 65cbe5aecac32fe4…

MALICIOUS

PDF

58.5 KB Created: 2020-10-27 09:43:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 11c5b0dbabe55d969f0c5cb045cf29d1 SHA-1: b0d05eb4bebddec906a8d4bf5a55e1fc5f2ff7f3 SHA-256: 65cbe5aecac32fe42c7a098ba71013cb6a753911508be40e86cc39e0fcc16aa6
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=spaghetti+bridges+designs In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f96937d4baa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373998/normal_5f8c854b37821.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8eb3600e714.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f8e9655ebbf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f8b14e2ef2e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426571/normal_5f979a378e4af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375891/normal_5f9512a81fbbe.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://s3.amazonaws.com/vexosafugunu/70868284700.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/11520584152.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/45055061571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cffa4900-4e96-4774-836f-3905322bb23f/79446930665.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9cf1dfa7-8088-4ab2-b79c-fba98632ab6f/39261290838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ef3a21-5dcd-43c1-a3d4-8b192a6913f4/39899144950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0885171d-ab3a-4c93-aafe-fdb66d0200a5/83423174599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bed606-6ee7-4629-920d-7c53b62a384d/gukure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06014325-5168-453f-91c7-76396227522d/78903987834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efeca3bf-fe74-4515-afcb-eb2861bb29d5/5073814707.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7925710d-a982-4504-8682-72f896998dda/10513834083.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/alfonsine_tables.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/85326290.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/vubapununevumo.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/folabikovodapuvomabepuv.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_off00009807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9807 5108 bytes
SHA-256: f4294d78031f6a4191963bf1f6b8765b121deee8871b62f01862d6d0db32daea
font_01_sfnt_off0000a944.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA944 10860 bytes
SHA-256: 05235e894fb14e2f198412db6d77ed507d301db47c5c6e9dfafc5a94ac9d8edb
font_02_sfnt_off0000ce59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE59 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.