Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe28d736b78fc87…

MALICIOUS

PDF

73.5 KB Created: 2021-02-17 20:51:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e840c4367f333359aaf55105cf2f3248 SHA-1: dd08366f2cab442e76705e65314a79f398155c9d SHA-256: 0fe28d736b78fc87f0bae1a29c07461b6a894d1555200f1d5038924a8418b6cb
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/123?utm_term=dyson+dc25+vacuum+filter+cleaning PDF link annotation
    • https://puwulafu.weebly.com/uploads/1/3/5/3/135329465/wezopig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426407/normal_601de0523e198.pdfIn PDF document text
    • https://xolesozetenosox.weebly.com/uploads/1/3/1/0/131070434/bulawiwes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381095/normal_5fe9e6e0d3938.pdfIn PDF document text
    • https://rubirilubuz.weebly.com/uploads/1/3/4/2/134266621/zanolejexopimatem.pdfIn PDF document text
    • https://cdn.sqhk.co/toviranevu/hewPett/32854891479.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ghihjbu/rulosikigubuvol.pdfIn PDF document text
    • https://fadesirowawilej.weebly.com/uploads/1/3/1/6/131606674/7430262.pdfIn PDF document text
    • https://zudejuzire.weebly.com/uploads/1/3/2/6/132681250/rirerafagisozunij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495400/normal_600ca21a7d105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_600ed0dec70b9.pdfIn PDF document text
    • https://zefemebok.weebly.com/uploads/1/3/0/7/130775969/3e8a7442c13b27.pdfIn PDF document text
    • https://cdn.sqhk.co/fojilude/4ggjgie/18287237546.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/najipavez/jagomilawuguk.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/obc_caste_list_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/putelekireza/datatables_ajax_post_form.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/52564036830.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/in_search_of_answers_destiny_2_bug.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_off0000e338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE338 5756 bytes
SHA-256: 16dc2110a3c3622f36b9fc8ef374c62dfb388ad6d4a07585b5b0b6ae86874cb7
font_01_sfnt_off0000f6d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D9 9876 bytes
SHA-256: f6e8fb5f8c22d0aca67557799709671f20c9c558c49242583ace7fe93eecbbc4

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