Malicious PDF — malware analysis report

Static analysis result for SHA-256 b263515d12baceda…

MALICIOUS

PDF

83.1 KB Created: 2021-04-03 16:13:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 62f81e44a22ed420f09bf21b076e06bb SHA-1: c5b6780e331d7d16334d30b70058e2ad4294ceac SHA-256: b263515d12baceda1eb6f2d1f6542701046716d6b36288292b25ae6747ebd1ae
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and a phishing/malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=flash+yongnuo+560+ii+manual+espa%25C3%25B1ol PDF link annotation
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/pididulusa_vajovosidoz.pdfIn PDF document text
    • http://giwitap.getenjoyment.net/wonibutabuduvusagosime.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/what_caused_the_naturalization_act_of_1790.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372723/normal_5ff18105ee647.pdfIn PDF document text
    • http://bazatojinipuw.22web.org/star_trek_2009_trailer_espaol.pdfIn PDF document text
    • http://xojudesabesone.66ghz.com/55898956284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411702/normal_602a3c770fdb0.pdfIn PDF document text
    • https://mekasirizi.weebly.com/uploads/1/3/5/3/135325166/xovugana.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5fcd5cc02ead0.pdfIn PDF document text
    • http://muzesumulel.getenjoyment.net/arihant_biology_books_free_download_class_12.pdfIn PDF document text
    • https://tagalevef.weebly.com/uploads/1/3/0/8/130815582/8823611.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499653/normal_6007dd931272d.pdfIn PDF document text
    • https://vujebitaj.weebly.com/uploads/1/3/4/7/134759162/buvinaxoj.pdfIn PDF document text
    • http://kinatoguvekajux.22web.org/lisanus.pdfIn PDF document text
    • https://disebaxixifos.weebly.com/uploads/1/3/4/7/134714932/757277.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palenogawufagi.epizy.com/performance_review_teamwork_and_leadership_examples.pdfIn PDF document text
    • http://dekifovep.epizy.com/string._format_datetime_format.pdfIn PDF document text
    • http://sedijinuv.epizy.com/filujawajowin.pdfIn PDF document text
    • http://kexomuradalo.rf.gd/microsoft_azure_az_103.pdfIn PDF document text
    • http://noratev.myartsonline.com/kuputaxe.pdfIn PDF document text
    • http://nekekuruwak.epizy.com/kovibovarademuxesutepo.pdfIn PDF document text
    • http://radikabo.rf.gd/fevofarokitamazesitodasu.pdfIn PDF document text
    • http://dekidad.epizy.com/46017730656.pdfIn PDF document text
    • http://sijarobe.rf.gd/9828664644.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_off000103e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E6 5828 bytes
SHA-256: 55abf9ea02df4584466d0ccd07d7f1419c8aaca042249e3390f979e9b349e6c1
font_01_sfnt_off00011761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11761 11464 bytes
SHA-256: 5215650f09ebcde63eabc86f8ed092cb2b1320edb7a2926822b172e8637f09cd