Malicious PDF — malware analysis report

Static analysis result for SHA-256 65827223be10e874…

MALICIOUS

PDF

104.5 KB Created: 2021-05-03 01:40:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c8a4308146a3c8e03538743594aa88cf SHA-1: f95e4b56659e8cb3aae31782fe5db31f6cc1c448 SHA-256: 65827223be10e874b70cddd7852b647ac1d1555795135e295ce0b64187ca4e62
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://kuzutuzo.ru/strik?utm_term=emerson+self+reliance PDF link annotation
    • http://zifufarox.getenjoyment.net/sonda_vesical_tipos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406202/normal_60691a2fce4f9.pdfIn PDF document text
    • http://wodedunor.22web.org/36277248160.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/JVYvgeI/samusazivadupuposikibor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416510/normal_6042d27edcae4.pdfIn PDF document text
    • https://jojobejuw.weebly.com/uploads/1/3/2/8/132815094/03074.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5fff69dd37728.pdfIn PDF document text
    • http://wavewozokuxa.getenjoyment.net/96063111642.pdfIn PDF document text
    • http://liwitesuzemumex.sportsontheweb.net/varegujozikafuxiziji.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/pengobatan_angina_pectoris.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/liwowedezosozifuge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471710/normal_6052d2ae66e04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478946/normal_5ff6c14abdfbe.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/cl0wJcl/nc_homeschool_testing_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/hvgdYje/panenokafimexedug.pdfIn PDF document text
    • http://kakerusejom.iblogger.org/mureb.pdfIn PDF document text
    • http://murimubijejaba.mygamesonline.org/zeganudabaw.pdfIn PDF document text
    • https://cdn.sqhk.co/tirewaku/gfy8ggs/rebodopofulim.pdfIn PDF document text
    • https://cdn.sqhk.co/sirazisiluz/egjVhcy/66540976608.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusevim.epizy.com/android_app_disable_auto_rotate.pdfIn PDF document text
    • http://gajerur.epizy.com/47430400178.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/66848215201.pdfIn PDF document text
    • http://pulilidason.epizy.com/kuvejupanijisadezazif.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001598b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1598B 4984 bytes
SHA-256: f6061b0c9585b980aa51a712d81e4eb7e62be22d7797fca69d6ca5d573f2e629
font_01_sfnt_off00016a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16A66 12204 bytes
SHA-256: b7911f141ed37256f225624667e03f7cc48e1d4b6fcb1481c5cf997e8a245515

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