Malicious PDF — malware analysis report

Static analysis result for SHA-256 2586864ff90c7b51…

MALICIOUS

PDF

69.0 KB Created: 2020-12-26 21:25:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: aba7a8e0cbf05bff2dd0337677c8610c SHA-1: 7139bd3366cf62addd8e2f6c5a43a802b950239f SHA-256: 2586864ff90c7b51e3ac852a8deab9ec3e4ff3e984ac774e46c0e8ac27dfc6e2
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URL 'https://traffnew.ru/123?utm_term=traductor+ingles+espa%25C3%25B1ol+bueno' is likely part of this malicious infrastructure, aiming to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/123?utm_term=traductor+ingles+espa%25C3%25B1ol+bueno PDF link annotation
    • https://vatalinonabalix.weebly.com/uploads/1/3/4/2/134234662/60e0d9462203d37.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/zanazanekoxel.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzonabudad/bngdfjg/9050763683.pdfIn PDF document text
    • https://xabetujozuveko.weebly.com/uploads/1/3/4/6/134682227/578e817.pdfIn PDF document text
    • https://sonuboguf.weebly.com/uploads/1/3/4/3/134310015/6682364.pdfIn PDF document text
    • https://lisamotakix.weebly.com/uploads/1/3/4/3/134308999/pefuwe_nibamivavo_bareran_goxax.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/zakeme.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/saxefi/80858117427.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/canadian_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zonebon/likurevopesoro.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_off0000c064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC064 5424 bytes
SHA-256: 197dcc59abe4623fbab59b9094e829745b394973247a9d8ed33dd27587f048ef
font_01_sfnt_off0000d28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28D 11332 bytes
SHA-256: 97b8b7beecab40d84835db4161f6138bffe3a7205d4ad55ed08c0ae5168da0fc
font_02_sfnt_off0000f752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF752 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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