Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfbfc86969bd400a…

MALICIOUS

PDF

73.7 KB Created: 2021-02-16 18:49:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 531b40930a5b39e0c611245fbfd90173 SHA-1: e211ed9d5c06d3be26ace10561af70395e7bceed SHA-256: dfbfc86969bd400abd0bf4a3a04658debf37de5f1740f6a8410c3d5d5cca265e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs suggests the PDF is used to redirect users to potentially malicious websites, likely for phishing or to download further payloads.

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 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://druttle.ru/strik?utm_term=capsim+forecasting+round+1 PDF link annotation
    • http://xtina.online/20978065201i9y0g.pdfIn PDF document text
    • http://mscgis.net/inorganic_chemistry_principles_of_structure_and_reactivity_4th_editionft0lv.pdfIn PDF document text
    • http://tojagetuwiger.iblogger.org/tamil_cut_songs_love_failure.pdfIn PDF document text
    • http://topstudy.fun/apc_smart_ups_rt_3000_manualxz288.pdfIn PDF document text
    • http://modernstyle.pro/sydney_harbor_tunnel_traffic_reportygq5e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawujularow.rf.gd/full_form_of_ktm_motors.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/chromeleon_6._80_user_manual.pdfIn PDF document text
    • http://kutugujipix.epizy.com/67056996693.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/15438538905.pdfIn PDF document text
    • http://pudunajuge.rf.gd/61619285086.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/jozegezokofe.pdfIn PDF document text
    • http://ziboporo.epizy.com/kutusuxazix.pdfIn PDF document text
    • http://disobaratid.rf.gd/drinks_menu_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lerezazo/c_class_design_guidelines.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_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 5400 bytes
SHA-256: 4efe493efd615aa1308266164a4bd742e54c2ea785379862678f6ec7f8fd463a
font_01_sfnt_off0000f36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36C 11316 bytes
SHA-256: 5f2e5ab54bcbf49f24ab30b0f9aa9f79331d32f087756884cec84679de760f3c

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