Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7e93d6335f55224…

MALICIOUS

PDF

98.7 KB Created: 2021-05-12 14:19:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f2ebf65c3f3a8c168d4db158ff16999c SHA-1: 2371d44c7813cda2b74ea89d809d63643c799f64 SHA-256: a7e93d6335f55224ae2a685d362ea5e38afcd071d1bfe444e98658d78ce2f2dd
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, characteristic of a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://ponafet.ru/strik?utm_term=gas+water+heater+installation+cost+nz PDF link annotation
    • http://sipataj.sportsontheweb.net/zixilurunubarufovil.pdfIn PDF document text
    • https://cdn.sqhk.co/gefimiwotux/iaShjgg/bioplastics_production.pdfIn PDF document text
    • https://cdn.sqhk.co/xafemepino/ihZSijb/post_comment_html_template.pdfIn PDF document text
    • https://lobovalosidim.weebly.com/uploads/1/3/1/4/131437181/senoga.pdfIn PDF document text
    • https://cdn.sqhk.co/kojetozativ/HphdjcQ/15632950082.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugisaxap/ciijfge/g_switch_2_armor_games_unblocked.pdfIn PDF document text
    • https://kapadarobuziwel.weebly.com/uploads/1/3/2/6/132696145/1905227.pdfIn PDF document text
    • http://ligazilafibab.22web.org/death_by_a_thousand_cuts_sheet_music.pdfIn PDF document text
    • http://zakunofukar.iblogger.org/89164495809.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/42375930584.pdfIn PDF document text
    • https://cdn.sqhk.co/tipadasa/ifXvhiS/samsung_members_v1_app.pdfIn PDF document text
    • https://xinagaxigivawiv.weebly.com/uploads/1/3/0/7/130739766/93403a2.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/9360976.pdfIn PDF document text
    • https://gomafaned.weebly.com/uploads/1/3/5/2/135296522/fuwavix_bilikunonip_poratejozegameb_wafobewosasuvif.pdfIn PDF document text
    • http://kazotapojiwi.mywebcommunity.org/vuwagakajuka.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lavebaku.rf.gd/6465590740.pdfIn PDF document text
    • http://pevipitoz.atwebpages.com/gatunok.pdfIn PDF document text
    • http://lupewozer.rf.gd/balanitis_micotica_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/lolijexejomak/xikarugijirigi.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/19484188182.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/17435026201.pdfIn PDF document text
    • http://roxutudutupit.epizy.com/project_activity_log_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/xovajukoxin/lebapomanipusogezix.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_off00014502.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14502 5060 bytes
SHA-256: 1cb5247f4fdaf61996680ffb3f9dc26fd1957ed5cd0fb8fd1d8f2e579520a4b7
font_01_sfnt_off0001564e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1564E 11440 bytes
SHA-256: 28e73fb9eeb1e3744905d6fa67d598712b64f2b519155070ff7fa376cbed9415

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