Malicious PDF — malware analysis report

Static analysis result for SHA-256 75a3aec8ab7ea5d4…

MALICIOUS

PDF

76.7 KB Created: 2021-03-22 06:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 23ba8d0d19fe3c4d04707615176ef2b0 SHA-1: daf7746a4f36b8cb8b3f035ebf3520e0ade42855 SHA-256: 75a3aec8ab7ea5d434b732aafbdb20be6de2c84beb26f5aff8b9d0cdbeb514c4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=como+yo+te+amo+gloria+trevi+lyrics+english PDF link annotation
    • http://characduwe.space/348905328334106f.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/4_types_of_informational_text_examples.pdfIn PDF document text
    • http://vopugixeroramox.medianewsonline.com/91643984355.pdfIn PDF document text
    • http://portkamesto.site/15452950257z3w0s.pdfIn PDF document text
    • http://lnstagramcopyrighthelps.com/65126482075uyf7s.pdfIn PDF document text
    • http://goldotzyv.ru/pijiruckn7v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://budokukikaririd.rf.gd/5381407139.pdfIn PDF document text
    • http://bugifub.epizy.com/difference_between_workbook_and_worksheet_wikipedia.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/pdf_to_word_converter_free_app_for_pc.pdfIn PDF document text
    • http://xazopufegi.onlinewebshop.net/63801026917.pdfIn PDF document text
    • http://tikolikenugim.epizy.com/atoz_all_odia_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/pathogenesis_of_irreversible_cell_injury.pdfIn PDF document text
    • http://vufudaz.rf.gd/adenosina_2020.pdfIn PDF document text
    • http://kifemulawej.epizy.com/every_stephen_king_film_ranked.pdfIn PDF document text
    • http://duzixaludu.rf.gd/39953871369.pdfIn PDF document text
    • https://s3.amazonaws.com/mikibetiv/39240439183.pdfIn PDF document text
    • http://mimarenunev.rf.gd/lukas_graham_7_years_old_lyrics_spiderman.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/baldum_aov_guide.pdfIn PDF document text
    • http://jolurula.epizy.com/analytical_chemistry_jobs_europe.pdfIn PDF document text
    • http://vuxonisozezuxov.rf.gd/esl_literacy_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/stackable_washer_and_dryer_reviews_consumer_reports.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/tesut.pdfIn PDF document text
    • http://xofinawudira.rf.gd/case_study_topics_in_computer_science.pdfIn PDF document text
    • https://s3.amazonaws.com/towakog/sportcraft_air_hockey_table_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE55 3984 bytes
SHA-256: 484020a2f5dcdb45953ca53ecb5b2462a4b03ec0ce07dfa3f0987f15f269fcba
font_01_sfnt_off0000ec67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC67 5280 bytes
SHA-256: e63d64c1cfeca5f05302c521f77911555868d44a371464d855d66ada8981e3a9
font_02_sfnt_off0000fe3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3B 11296 bytes
SHA-256: 2b0c9ff851196b12c32cf75bda6ff01b095c95efef281c37b96420e6b6318176

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