Malicious PDF — malware analysis report

Static analysis result for SHA-256 e435ba53c7039b7d…

MALICIOUS

PDF

82.8 KB Created: 2021-03-28 11:14:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9bfda37e39c249bd6916617c8ad30ed9 SHA-1: 90f3f470c135006e146bfd35904b896e12922fbe SHA-256: e435ba53c7039b7d0f265360bc3a5da6d1284c8da3535ea684aee11a093adf94
96 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ML classifiers and ClamAV, indicating a phishing or trojan payload. The embedded URL `https://leonvi.ru/123?utm_term=alopecia+areata+pdf+2018` suggests a lure to download further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to trick users into accessing external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/123?utm_term=alopecia+areata+pdf+2018 PDF link annotation
    • https://cdn.sqhk.co/libibajuzumu/igOrheb/the_duchess_of_malfi_john_webster.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/gtgf402/fadubikav.pdfIn PDF document text
    • http://bionatur.space/bugofitiv0l0b.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://kdghy.online/dj_bottle_telugu_loiwt0r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485450/normal_5ff85b40e1fe7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_6018165199ac7.pdfIn PDF document text
    • http://genoray.pro/bepatugitejixuvixz3rpf.pdfIn PDF document text
    • https://cdn.sqhk.co/felebamifuk/RjcFVjb/76736781954.pdfIn PDF document text
    • http://tagaporigowekis.mygamesonline.org/ibps_clerk_syllabus_download.pdfIn PDF document text
    • http://zunololanuxigu.sportsontheweb.net/html5_input_type_file_accept.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_60274d7010457.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_600c7dcfa72c8.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/zurovajij/online_to_excel_converter.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/3675968957.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/nenarabitakafijolapusewum.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/baar_baar_dekho_full_movie_openload.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/deforestation_hd_images.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_off000104e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E1 5480 bytes
SHA-256: c5386b7a3f2a4e1c1c5b0a832b178cf07f6701082f1cb1d69327dd5c9a5bfcb4
font_01_sfnt_off0001179a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 12128 bytes
SHA-256: da5a09dbf0ab4a6a18ca5ee730916306c018dceda16f531ef57742a92dfe4b90

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