Malicious PDF — malware analysis report

Static analysis result for SHA-256 502422db733d3f75…

MALICIOUS

PDF

71.6 KB Created: 2021-03-04 06:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3e602287292fec6a759eacf69d1e5969 SHA-1: 1ff2ab9f48a479188bbe59f14b58f3bbaead28d5 SHA-256: 502422db733d3f7564b21718a92419d1d65c0cf57bfcbf2d32679a7d1c3adb1f
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious URL, which is likely part of a phishing lure designed to trick users into downloading further malicious content or providing sensitive information. The document body, though heavily obfuscated, appears to contain metadata related to the PDF creation tool, suggesting it might be a wrapper for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://nipisod.ru/wb?keyword=dymo%20letratag%20label%20maker%20power%20cord PDF link annotation
    • http://jofufunobek.sportsontheweb.net/sylvania_dvd_player_universal_remote_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/sobexofap/ggVaXZD/fazidotarozunu.pdfIn PDF document text
    • http://xteenware.online/how_to_use_a_scale_ruler_metricwguhn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393790/normal_5fe61e0742247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369331/normal_600119989bb25.pdfIn PDF document text
    • http://garobunatuxovi.scienceontheweb.net/rafeku.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/what_are_examples_of_dynamic_data_structure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477630/normal_6012a3a129e25.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/difigomisosak/functions_and_relationships_worksheets_grade_7.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/craftsman_yt3000_belt_number.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/haitian_international_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/gemadu.pdfIn PDF document text
    • http://butorinowu.myartsonline.com/istqb_manual_testing_interview_questions_and_answers.pdfIn PDF document text
    • http://pujumek.myartsonline.com/what_is_the_fundamental_code_of_jewish_civil_and_canon_law.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_off0000d79e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79E 5612 bytes
SHA-256: b1ed1975b686f6e02cb3988cae763c9237854838a4037e1a2691cda380ef2f17
font_01_sfnt_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 11128 bytes
SHA-256: 597306f6c65f92e7289f741bddefbc5c47ef5372d2eccb7553bba89c1bbf8bc9

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