Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f597fafdccfd87…

MALICIOUS

PDF

72.7 KB Created: 2021-04-26 07:22:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: eccb6d624528ae55895658405c60dfca SHA-1: 28c4c732b8ddcb41f980f5f5c595c8beb0644d76 SHA-256: 66f597fafdccfd87fd96705b2477da900a800cf3a6b1633bcb85d3f8cbc84202
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'fokemale.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, appears to be generated by wkhtmltopdf, suggesting it might be a crafted lure.

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://fokemale.ru/strik?utm_term=toshiba+ct-90302+how+to+program+dvd+player PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5feb9e6456f20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487626/normal_60302d0c480c6.pdfIn PDF document text
    • http://gizaxeredemuni.22web.org/banished_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5fd92730b0634.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/fosawef/20890266666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ff6ebb0-5b13-4def-aa51-1ae58f62cc08/bepida.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/mandated_reporting_pitt.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/23431974047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee3eca00-abd9-4dd9-bd13-dfca1a351e72/zimujima.pdfIn PDF document text
    • http://wugojofek.rf.gd/hoover_steamvac_carpet_shampooer.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/football_manager_2016_best_players_to_buy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32a8b958-98a1-4825-98c3-2c31edd098b1/baledozobegesosunujera.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/business_analyst_approach_document_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fc1e54-39e9-4586-9368-85f745bebabc/30689314736.pdfIn PDF document text
    • http://rowodebifofida.rf.gd/altium_designer_viewer_summer_09.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/obstructive_sleep_apnea_surgery_guidelines.pdfIn PDF document text
    • http://galexuduxegi.epizy.com/38860762297.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/bunabefilixiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fad4f47-b7ed-41a9-9c26-920c68c801ea/29955653912.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_off0000dc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC03 6456 bytes
SHA-256: 351edb28920e87ecf97c0c2370de370204c3a4885c06daf523e7cde5e876d8c8
font_01_sfnt_off0000f1e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E3 10544 bytes
SHA-256: 48c453cc604317781c491dc6a8ff057da28023feb9abc30230fdeeca069ee1a8

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