Malicious PDF — malware analysis report

Static analysis result for SHA-256 80986f3542027f52…

MALICIOUS

PDF

75.9 KB Created: 2021-05-11 11:12:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: dc7187d624ef730f21c0a94bf1d6e81a SHA-1: e3cc9b9081cd2b18e15e2798407372c0bccd9d8f SHA-256: 80986f3542027f52305d688b8e0ecd691d657df1b417757a54d534479a9c439c
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://golowaki.ru/strik?utm_term=what+is+the+strongest+strong+acid', which is likely used to deliver a secondary payload or redirect the user to a phishing site. The document body is heavily obfuscated and unreadable, but the presence of external URLs and the ML detection strongly suggest a malicious intent, likely related to phishing or malware distribution.

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://golowaki.ru/strik?utm_term=what+is+the+strongest+strong+acid PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416326/normal_5fe5f1823bbfb.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/BgfBgji/jidetur.pdfIn PDF document text
    • https://cdn.sqhk.co/tegasipitif/mWeoGaj/87238078109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_6006af7f41b8d.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/Z2zGKjd/jimavulubogi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460251/normal_6059026bea654.pdfIn PDF document text
    • https://cdn.sqhk.co/segidexu/gdieYja/plane_controls_gta_5_keyboard.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/hhdJ13h/81400365597.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/bhagcjg/stock_exchange_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/jupujezaxa/hajfNii/80812214008.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/zebarufuridorur/how_to_name_your_dog_in_minecraft_pe.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/extent_report_jar_files.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/what_percentage_of_cocoa_is_in_hersheys_milk_chocolate.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/begum_hazrat_mahal_scholarship_2019_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a34c5fc8-28c2-42ec-80bb-c37a832c4e8f/genie_pro_max_2_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/best_android_16_dokkan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e13f5f3-159d-46a9-9ba1-b76b6f5a770f/grammar_book_for_elementary_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c5df7c9-3711-4dbb-bf35-5754c50025c9/best_gmat_prep_course_for_verbal.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_off0000ec20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC20 5180 bytes
SHA-256: 8b628cf96adcd0b0346bce84ca12060dd4dd9b99669a9efa9281a8d6404b2ac6
font_01_sfnt_off0000fdc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC4 10760 bytes
SHA-256: 2f32908d6a023ae1abc015d12496b51687fa79ff91dcdb896985749449679bb7

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