Malicious PDF — malware analysis report

Static analysis result for SHA-256 63ed53be6b5d1215…

MALICIOUS

PDF

64.3 KB Created: 2020-12-19 19:24:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: ba318755110e6681f21975306124390d SHA-1: 9747693ccb684c8a08e8e7b1a50854e2448e7e2d SHA-256: 63ed53be6b5d121571f6e50b175d0496ab92081bebfca9477280644a2335381e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafftec.ru/123?utm_term=kellogg%2527s+stages+of+art+development PDF link annotation
    • https://fotejisatowonu.weebly.com/uploads/1/3/2/3/132302873/6028188.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/1485495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_5fb5b260dfbc3.pdfIn PDF document text
    • https://bizumoku.weebly.com/uploads/1/3/2/6/132681494/mogimodagoparafo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8abf9b9973c.pdfIn PDF document text
    • https://velolabojenap.weebly.com/uploads/1/3/4/5/134525374/274467c343.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/dufugitirixuminik.pdfIn PDF document text
    • https://duludogom.weebly.com/uploads/1/3/4/6/134673238/rapomo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc5dc63f7cf8c75404cc06f/t/5fcaf4839cf56e0e8b0885f1/1607136388329/xuxumigolevegomuwoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb1e263-5365-4e28-ace6-c8ff6cf39554/forumisekuporibatolam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dad3da8e-70c7-41ff-a639-4ffdde8fed9d/21968097292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ad79b51-5d17-4481-bdd2-b0c9eb6ff7b9/51162648101.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D6 5424 bytes
SHA-256: 01d016e896155508c0ac8a528bffc1e127f7e44b9771a36cf3febbce86bd9df3
font_01_sfnt_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 9848 bytes
SHA-256: 7a240c97e875da055c9d687fb66a4fa9b17b6d5ec8da13b43557dd394e498c21

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