Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebee5955fcab0db1…

MALICIOUS

PDF

72.9 KB Created: 2021-03-02 10:02:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 735bbe866e8774956a1cd6add6b28c15 SHA-1: c907580833b022ac2708335376777668c301017f SHA-256: ebee5955fcab0db12d34a7d45e0d5c070c8cf80c74dfd6b719b7b33f151f5665
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with one prominent URL being 'https://soxebez.ru/strik?utm_term=will+disneyland+be+closed+until+2021'. This suggests a phishing or malware distribution attempt, leveraging a deceptive lure about Disneyland closures. The presence of multiple disposable domains and Weebly/epizy hosting further indicates malicious intent. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/strik?utm_term=will+disneyland+be+closed+until+2021 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451955/normal_5fc8c82895e70.pdfIn PDF document text
    • https://fakilopatezi.weebly.com/uploads/1/3/1/6/131606638/pibaf.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/vugivozepubirizawixa.pdfIn PDF document text
    • https://wunurobi.weebly.com/uploads/1/3/4/8/134881210/9f031530f5928f.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/8siejdN/neruxasolirajesuwodu.pdfIn PDF document text
    • https://cdn.sqhk.co/bimolixumotu/hGiahfO/deeeep_io_beta_apk.pdfIn PDF document text
    • https://fezapatinegu.weebly.com/uploads/1/3/4/2/134266508/9591733.pdfIn PDF document text
    • https://cdn.sqhk.co/gimexigerub/bhdjc8A/24948589499.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416332/normal_5fedd52ebc9d7.pdfIn PDF document text
    • https://cdn.sqhk.co/bamebuxi/gigcxxR/65323999981.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/us_army_officer_pay_scale.pdfIn PDF document text
    • http://gixibuni.22web.org/bomuwewa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vekubuj.rf.gd/texilekinivepupexupido.pdfIn PDF document text
    • http://katevafitaga.epizy.com/iamsterdam_weekend_guide.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/brother_ds-720d_user_manual.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_off0000df72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF72 5420 bytes
SHA-256: fd3ae6ea61ebac482bdf171fce7c63ce0abe44db741a6cae0e344498b91e955d
font_01_sfnt_off0000f207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF207 10688 bytes
SHA-256: cffbfb1892e31abcdf71fe91fbe78f26fea0003c8ebd18b0640f8392c8a0ba03

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