Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e6841a15c6fba0c…

MALICIOUS

PDF

78.8 KB Created: 2021-05-25 07:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 55b11eeeb3d7a52b4f23481b042e1874 SHA-1: 135aa617340f4f9f3ac2ef30b61a2d4390179768 SHA-256: 7e6841a15c6fba0cb38685d97778c6e5ed202c8c0b0ce17962e0b6cd75127b59
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=nursing+2020+drug+handbook+wolters+kluwer+pdf+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403676/normal_5fe38188e349e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462775/normal_6055ca8541af7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366633/normal_5feb15688c30d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452152/normal_5fcf8172ef0e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505687/normal_5fdedb71d5eb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425227/normal_60643e520b08a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5fdc515abd2d0.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/bulalowisu/indian_criminal_law_books_in_tamil_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/31079426096.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/powavuda.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/nightmare_before_christmas_song.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/what_is_the_chemical_formula_for_triglyceride.pdfIn PDF document text
    • https://s3.amazonaws.com/sebunuzu/chemistry_colligative_properties_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/nagosov.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/dynamite_trumpet_sheet_music_easy.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/how_to_connect_crosley_record_player_to_bluetooth_speaker.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/nyc_dep_water_and_sewer_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/what_are_some_centripetal_forces.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/development_as_freedom_amartya_sen_2001_oxford_university_press.pdfIn PDF document text
    • https://s3.amazonaws.com/dewazewokib/rogemoregikujanelimadi.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/garmin_2595lmt_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/top_questions_and_answers_for_teacher_interview.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_off0000f429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF429 5844 bytes
SHA-256: 9733bb9c1ae4f032f19a1faf37fb6634de7b45916f4ebb3a3e95333cdaa777bf
font_01_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 11132 bytes
SHA-256: a0d0134a29c18934939d547dcf7f7df927612e02f2db3781fa2512fd58901d09

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