Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbe4f2c77227d59…

MALICIOUS

PDF

76.5 KB Created: 2021-05-01 01:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c6e4516650bf9d154c1423e765ff984b SHA-1: ec22bfc369c6fdeb29f932350fb3911539766f4b SHA-256: 2fbe4f2c77227d598674014046e24138f3586733ed6ac062cb7c4a8a2427c988
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs that redirect to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search queries, suggesting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=can+a+wood+stove+heat+a+whole+house PDF link annotation
    • http://bovewitavivebu.getenjoyment.net/78606878310.pdfIn PDF document text
    • http://vivubowi.getenjoyment.net/graphic_design_salary_in_bangladesh.pdfIn PDF document text
    • http://tofugezupeb.mygamesonline.org/bixakesaj.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/56584568737.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefilodeza.myartsonline.com/cadena_de_suministro_esbelta.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/saxophone_repair_shop_philippines.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/56964034527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2430ed6-8c15-4da1-a5c4-cb5a426e8748/42518976517.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/female_reproductive_system_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be725b3-5aa7-4fe9-9689-013a89eac8c9/why_is_gni_lower_than_gdp.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/powexujomumolodetubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9616ac81-d419-4f0c-a640-9fd1885e681d/chamberlain_whisper_drive_wall_control_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/ansi_c_programming_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/lamanasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55aa4d86-e2e0-44a8-bba9-c75b58d9d641/what_was_the_first_political_party_in_uganda.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/hangout_for_pc_windows_8._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53338c8a-a89a-431b-b237-b54e6e356d08/bodybuilding_exercise_routine.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/topugujitapakarizesolugoz.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/16152539477.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e41b84aa-3327-4c1a-a6da-4ae41205f70a/13366840540.pdfIn PDF document text
    • http://kubowulurarekij.myartsonline.com/nalunuvoxetisaw.pdfIn PDF document text
    • http://gozuketitara.onlinewebshop.net/buying_behaviour.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9b70dc8-631a-4954-b1f6-a0344466767e/mobile_call_gsm_alarm_system_user_manual.pdfIn PDF document text
    • http://magegefopo.atwebpages.com/10_bipartite_settlement_for_clerk.pdfIn PDF document text
    • https://s3.amazonaws.com/legesiliv/concrete_column_design_excel_spreadsheet.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_off0000ef6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6D 4876 bytes
SHA-256: 80959e5f99acca5e40e5d4837fc3bb5a11163d123a84f61069b4a52571d80e29
font_01_sfnt_off00010014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10014 10796 bytes
SHA-256: 20a50290c923d77f0920f9a2bc6bb23703fb00e9865549fb584e62c022de4105