Malicious PDF — malware analysis report

Static analysis result for SHA-256 75f2c9c1d0c67657…

MALICIOUS

PDF

73.5 KB Created: 2021-02-02 04:16:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 28aa3ca32af1f364fecc3674e9d50797 SHA-1: 7ab542ac4100fd33ae4d771946918251d1e7f021 SHA-256: 75f2c9c1d0c67657f330967f4affb30f70ad664ee2fde1b9e36bc4a0e7ee1f46
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with many pointing to disposable hosting services. This is a common technique used to distribute phishing lures or redirect users to sites hosting malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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://baarspo.ru/123?utm_term=tingley+icon+rain+gear PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414360/normal_60166fbd10a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413373/normal_5fe7866e089c5.pdfIn PDF document text
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/5195152.pdfIn PDF document text
    • https://pabaxugu.weebly.com/uploads/1/3/2/6/132695470/286072.pdfIn PDF document text
    • https://cdn.sqhk.co/vobipibomuk/ibfgghi/zombie_defense_merge_td_games_offline.pdfIn PDF document text
    • https://wewowalowumuv.weebly.com/uploads/1/3/4/0/134040384/kukozur_xurumoner_tesedimemuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462093/normal_5ff6c8e629f79.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/c1de5.pdfIn PDF document text
    • https://mewofotas.weebly.com/uploads/1/3/4/5/134524455/f983985157.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480423/normal_6015236dd3c58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369520/normal_5fcf10d128df9.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/UOVa2VM/men_s_world_cup_2026_cities.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/vilat_duvewexigam.pdfIn PDF document text
    • https://biwoponafi.weebly.com/uploads/1/3/4/7/134767969/faxavetem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383916/normal_5ff7d28ba7499.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/l7jgGia/nda_exam_syllabus_download_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 4840 bytes
SHA-256: ffb1471ace4f82fe0a01c4e3cf94cc790516a4481fd629a09a6d3957d1fbfb72
font_01_sfnt_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 10796 bytes
SHA-256: 9d9fa5b8586dfcbf87a83bc0389090c996d037bb46ecbc04648760702c596df1

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