Malicious PDF — malware analysis report

Static analysis result for SHA-256 498e0e1c7b694501…

MALICIOUS

PDF

75.9 KB Created: 2020-12-27 18:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fd4c262cbba5b224be09ae7cf1768225 SHA-1: 4df631ee5e8af306666d36dbf0ed0bf3bb8f1b44 SHA-256: 498e0e1c7b69450123e1262b435bd7c058b5884f966987a0d1aaa709171dd825
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/strik?utm_term=world+cup+2018+time+table PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407060/normal_5fd1fba9ce7de.pdfIn PDF document text
    • https://mabogafopesusa.weebly.com/uploads/1/3/4/3/134307699/fawativisafotul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489042/normal_5fab353e4147f.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/iejj2gh/bike_wheel_size_height_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/RRQUMbj/9901066243.pdfIn PDF document text
    • https://cdn.sqhk.co/tadawatimi/atWijhh/15255832176.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/panokojol/87829665508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35cfc942-cce1-43ad-bb56-82774eacd7f8/60234401786.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8525c58b-33fb-4c8d-b13c-d21a44353e30/71077429696.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b10588-93a9-4a6b-b9fd-c5c3c4c3fe61/wetaranexuzuferig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46e4658c-5e12-4e3f-93b6-9aea489fb2dd/luke_chapter_14_summary.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_off0000eb10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 5716 bytes
SHA-256: 69e64793f7f63d7142f27697f493a509da36b43ab6a732ed1eef51ba1fd30fc4
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 10968 bytes
SHA-256: 1cbc7e58d512b944771ac266b3e55434e615701deb48d310c3abd335baa2334c