Malicious PDF — malware analysis report

Static analysis result for SHA-256 66719852ae904798…

MALICIOUS

PDF

74.6 KB Created: 2021-04-22 11:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: aaa433d63e08db8cafe45a8e044de69b SHA-1: 7a481a296d637efc0bb154466d8e70ed8b86c49e SHA-256: 66719852ae904798f40518970370f188d2e0b1de87eaabd29d9990176b37caee
126 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary URL, 'https://xezojetit.ru/strik?utm_term=what+is+taco+bell+fresco+menu', is likely part of a phishing or malware distribution scheme. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=what+is+taco+bell+fresco+menu PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5fe819706a896.pdfIn PDF document text
    • https://cdn.sqhk.co/rogevuzazi/fge94hf/28489738023.pdfIn PDF document text
    • https://cdn.sqhk.co/novimabe/bDMvheG/jinodubila.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407086/normal_600d25d99b845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408853/normal_60381a8721453.pdfIn PDF document text
    • https://cdn.sqhk.co/sovokeduseb/bijZNji/rise_of_generals_apk.pdfIn PDF document text
    • https://vimanofadubob.weebly.com/uploads/1/3/5/3/135304206/xevul-vudabaga.pdfIn PDF document text
    • https://cdn.sqhk.co/fadanade/javYiiL/22961428829.pdfIn PDF document text
    • https://limisakaxenit.weebly.com/uploads/1/3/4/3/134371081/5981950.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/jggEynW/dazejazejole.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/286100.pdfIn PDF document text
    • http://midadef.iblogger.org/roll_over_to_zoom_troy-bilt_gasoline_edger_25a-516-766.pdfIn PDF document text
    • https://nusewumu.weebly.com/uploads/1/3/2/7/132740482/261294.pdfIn PDF document text
    • https://cdn.sqhk.co/ninilevikod/igeVgfO/wajomedij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a2dc46e-5986-41e6-81e5-e10b04f593d5/brother_lc101bk_target.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53506593-33f2-44bc-a34a-48f6eebaa9f4/buveduv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71fa1074-1227-4eea-a827-6546e7378102/philips_aquatouch_shaver_heads.pdfIn PDF document text
    • http://zinexisororip.epizy.com/separation_techniques_worksheet.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_off0000e441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE441 5272 bytes
SHA-256: 80cba7ae7b90ed02797915ddff54df5d69599f9ce541d945e362a4d76aef45a3
font_01_sfnt_off0000f618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF618 11092 bytes
SHA-256: 3a8be578fcf422a6d932723703341ad7a081b1aae66b2228acc325787e1a55a8

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