Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3823878e4049c5…

MALICIOUS

PDF

82.4 KB Created: 2021-02-09 12:16:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 99cc2781ad83f7d51c932389533ea7f7 SHA-1: afa31d53ccc473ea994598def88ee1d41225d9c8 SHA-256: fe3823878e4049c5f407b7a16ba436e58c609419f1080d868a7ba8d02fad0114
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many pointing to disposable domains and potentially malicious content. Heuristics indicate a link farm designed to manipulate search engine results or distribute malware. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest an attempt to redirect users to malicious sites, likely as part of a phishing or SEO spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://seumenha.ru/123?utm_term=measure+of+spread+math+definition PDF link annotation
    • https://cdn.sqhk.co/posojuvapono/c11JUSy/dowarutoxegubibesafi.pdfIn PDF document text
    • https://lepepapiminokuj.weebly.com/uploads/1/3/4/4/134493398/tarumapem.pdfIn PDF document text
    • https://dudafizegananif.weebly.com/uploads/1/3/4/8/134864336/3831074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425501/normal_5ffcb535bbad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387226/normal_601391926044c.pdfIn PDF document text
    • https://cdn.sqhk.co/labifikup/gdDhh0s/cowboy_hat_emoji_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/qghSgf4/wogaratomuno.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/iihahdX/xasidafaledoguvixujagema.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefimex/hee82gi/59813594873.pdfIn PDF document text
    • https://cdn.sqhk.co/rajexizeba/fjbo6gc/47069893690.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_6007df03b23a2.pdfIn PDF document text
    • https://cdn.sqhk.co/zudusidesu/iaZWjb7/carrageenan_side_effects.pdfIn PDF document text
    • https://mozufakumijisa.weebly.com/uploads/1/3/5/3/135333945/jugusokikudu.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/385b3f69b.pdfIn PDF document text
    • https://cdn.sqhk.co/totuzilexif/jd7bGja/space_invaders_infinity_gene_ps3.pdfIn PDF document text
    • https://zilakakazaxo.weebly.com/uploads/1/3/4/4/134442972/jalidetufabeg-sarit-refejazeb-riximaveboxa.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/roginalifejefu-dovozowisowa-noguzotonikebej-wetepigediletex.pdfIn PDF document text
    • https://tadilagene.weebly.com/uploads/1/3/1/3/131381422/94c828.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wosazexawejusu.rf.gd/napabenivatew.pdfIn PDF document text
    • http://duzexatalug.rf.gd/airserver_connect_user_guide.pdfIn PDF document text
    • http://fobukisa.rf.gd/bsc_exam_date_2019_kanpur_university.pdfIn PDF document text
    • http://ladorum.epizy.com/impossible_quiz_2_answer_53.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_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 5256 bytes
SHA-256: e2ba8b1c3eef6b3c61b257ccc34f0ff8a70187dc74bd1074b8504f2b909b6b54
font_01_sfnt_off00011422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11422 11204 bytes
SHA-256: b82c8effa69e653bd42d549b1d6ec09a6a836fcc8d89f4d9ef507a8af9e80576