Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52947803d1f6b8d…

MALICIOUS

PDF

59.5 KB Created: 2020-11-10 16:31:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d614cb1a6e802a9cca8c3bd59e97bb1b SHA-1: f43eced53a8a02284c3139c54a81f63994796054 SHA-256: b52947803d1f6b8d679ae756010e89a959a94ce5cdb7cd4e9d9174a4953da766
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/strik?keyword=custom+trailer+guide+pole+covers In PDF document text
    • https://tovuwopisivid.weebly.com/uploads/1/3/4/6/134640328/mikebunaka_meguz_jusogavepe_fifijenure.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/zejujurozutuzepu.pdfIn PDF document text
    • https://kexazupaxi.weebly.com/uploads/1/3/3/9/133997339/xoxizotemi.pdfIn PDF document text
    • https://lorovojiwu.weebly.com/uploads/1/3/4/3/134318747/bifad.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/1441719.pdfIn PDF document text
    • https://nulejifoxomopik.weebly.com/uploads/1/3/1/4/131437436/wuwaguwuleruve.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/cf00063e-28ec-47a7-8a15-a60819e783ea/49432726955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d14964c0-403e-4844-ab29-a3fa1fed5ea0/56512919344.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a49f4062-dda4-4b91-94e8-003e2cdf620e/nopuzoromim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12429431-0a58-4dcb-988a-90c623c7dc2e/belazavidototimif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f100ac-a752-4b6a-8ebc-f566a069a55d/muzazejavax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868d3545-d639-47ae-9ef6-111bd57f5acd/zizofobidopewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64224428-05c5-4e53-a3ff-7fdc32519db7/letters_and_sounds_phase_2_resources_worksheets.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_off0000adcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADCF 5356 bytes
SHA-256: 605250f7e189626c09e25a5a1ed1cb2fc351ddd54ea53693f961f57863f62b9c
font_01_sfnt_off0000bfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEF 9820 bytes
SHA-256: 8a6f7ebd8130ec34ffda0c6e901fdf2bdbc9734ff9371b1ab2a7115d311e1d49