Malicious PDF — malware analysis report

Static analysis result for SHA-256 77be4a02d977659e…

MALICIOUS

PDF

77.8 KB Created: 2021-03-03 23:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 40b8375d9b1bc49282c828b52b586ccf SHA-1: 159855128e7a45adabffa902feb78048e306b856 SHA-256: 77be4a02d977659e8130668fd4b730c06b7372995359c65df536de5724b32ec4
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a malicious payload or phishing content. The document body is heavily obfuscated, but the presence of the external URI suggests an attempt to redirect the user to a compromised or malicious site.

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://mezovuduw.ru/123?utm_term=harman+accentra+insert+distribution+blower PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417675/normal_5fffe88e67573.pdfIn PDF document text
    • http://good-production20.site/63253380906z6xzw.pdfIn PDF document text
    • http://levantegroup.net/67308972096ztiny.pdfIn PDF document text
    • http://fakts.design/how_to_clean_filter_on_whirlpool_cabrio_washernh9l7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390069/normal_603f06d104600.pdfIn PDF document text
    • http://idealica-columbia.site/58882899565lg9v8.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/lijopavexanuse/xolifobukogageza.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/bovebegixil.pdfIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/bursary_application_forms_for_law_students.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/jumefixitawegarowifa.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/warelamawikukarijiferalu.pdfIn PDF document text
    • https://s3.amazonaws.com/bivanud/33503081764.pdfIn PDF document text
    • http://nawonuzegajosi.epizy.com/place_value_chart_worksheets_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/update_android_9_lg_g7.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/mewadujawexigedukudavuzut.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/xowebilageragu.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/jawar.pdfIn PDF document text
    • http://simatan.epizy.com/xusigul.pdfIn PDF document text
    • http://sonunujudul.rf.gd/47429860620.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_off0000f20e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20E 5276 bytes
SHA-256: 2504c1509e6bccf0c8f42fb17a68052207bce4a9587eb104c878afa291e78af1
font_01_sfnt_off000103f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F0 10876 bytes
SHA-256: d1180d23be10641f6fee8ce839d8c2ec063557ae48fda5263e331f587b094cbe

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