Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebcbd1c406cbd3a4…

MALICIOUS

PDF

78.2 KB Created: 2021-04-25 21:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8d24d650a13811fd4f383f4c37624f98 SHA-1: b3f690eeb0f0c949da310ffc811ce30adba35221 SHA-256: ebcbd1c406cbd3a4876a90d99d43364c244aa7cf6d4d3e57ed9c607f6c5e221f
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests an attempt to disguise its malicious intent.

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://xajibur.ru/strik?utm_term=what+is+the+average+income+of+a+household PDF link annotation
    • https://cdn.sqhk.co/vojogalu/rZshcct/honda_gx240_engine_for_sale_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/ielWggh/86542874972.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/jldTACG/12995329384.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/peighdY/religions_of_the_world_13th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/parikozug/KnDjdij/34125155264.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/837f7eb6-9dbd-4211-b161-7b218211d5fe/python_libraries_for_data_analysis_and_visualization.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b62b294-0e26-49c5-adcd-669d13dd7382/how_to_know_acid_rain_remover.pdfIn PDF document text
    • http://tumaseminipofuk.rf.gd/6975382083.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abeadc86-91f6-4b10-9472-56e4ebf565b1/eventide_h9_max_harmonizer.pdfIn PDF document text
    • http://kinapemib.rf.gd/48298834097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f30211e5-16ad-40dd-baa2-91f3011849bd/what_to_do_when_thermostat_is_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe567e0-5aaa-49e2-8563-50c4d74dca6c/twilight_full_movie_download_in_hindi_all_part_filmywap.pdfIn PDF document text
    • http://tisudaxutuz.epizy.com/black_sheet_paper_images.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06bdb43-47e2-4edf-90c5-cc04669c78e0/1996_polaris_sportsman_500_electrical_schematic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4cad1df-eefe-42e2-a8e0-66ac26325af6/vepokapemafixodituxutexun.pdfIn PDF document text
    • http://bumitorazefi.epizy.com/49731870317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/492681f7-47b8-4775-adc6-fef5180f5acf/parts_of_a_functional_specification_document.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ef04bc-3898-466c-a4a3-ba31ad981791/what_are_conjunctions_words_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b63b45-feb7-44a2-ae63-625f82b9f073/51403839182.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aec8da0-a587-4514-9e44-68bbfae212ee/cub_scouts_uniform.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_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 5508 bytes
SHA-256: 49aeb7543c55613938f7516fb118c24b707ea5a16d4362f5c7362702fe84d4fe
font_01_sfnt_off000106f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F6 10608 bytes
SHA-256: d078899192ff1a44df457c27564c6786781141ec281f7fbd342134c82dd07d73

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