Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f91998147356a4b…

MALICIOUS

PDF

44.1 KB Created: 2020-10-07 23:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9f43a3882aa7c505a94ba487535bc024 SHA-1: 3373c32daf3e51486bf27fb0bcd5dcfd4365d5fc SHA-256: 0f91998147356a4bfb81d317fd7eae0656ee208f752516163e548accc94f9419
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=ielts+speaking+actual+tests+%2528september+%25E2%2580%2593+december+2019%2529+pdf In PDF document text
    • http://zaxuxubim.tracihighland.com/uploads/1/3/1/3/131380868/5986372.pdfIn PDF document text
    • http://daziz.virtuallens.co.uk/uploads/1/3/2/6/132683024/lesazesapatibunizub.pdfIn PDF document text
    • http://files.michaelkressdesign.com/uploads/1/3/0/7/130776734/5013931.pdfIn PDF document text
    • http://files.jacobs-midcentmod.com/uploads/1/3/1/6/131636736/7152b772512d0.pdfIn PDF document text
    • http://files.mcveyoutdoors.com/uploads/1/3/0/7/130739081/waniwojonaxex.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/5d50e899-5341-485c-8110-fde8dae53813/47484782663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94134062-1496-4334-bdff-e4d6e65de75b/zafedodiwik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ecce1d4-d584-456d-bf25-5d74f132d48c/ziwudogopotadagibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/880863b4-dc6a-4cb1-b86e-9b4b8ed4742a/talenibixasavixuwu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6f01be7-7ce3-4e4e-8c60-1adcf1b35fbf/22795234717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e6da82b-9e09-42fb-b124-c9c908e35c0f/pajuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb1d825d-1d97-4d8e-a959-83e06d8a9cf9/84471526070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4144c5b-31ff-49b3-93a8-57986fa4ca40/bujiruzuwaxuxokivinofadof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0606/6325/files/kojuwivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6069/0589/files/fugovotixopi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6631/7205/files/zirelibamugojabedolu.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_off000066f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66F5 6284 bytes
SHA-256: 8367fa564edf0d96ca9abc8cd8ac69240c688c9c8f4ff9da6d5515609b0e8e40
font_01_sfnt_off00007c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5A 10580 bytes
SHA-256: 0a4267a3d4029cea7e5220d2b4edfd1ea0a7b73a2f114bbd4fb57c6aa07704d8

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