Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d789ff04207428…

MALICIOUS

PDF

85.4 KB Created: 2021-03-13 23:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f001a1ed3519e43b380e48c7e2c02f8e SHA-1: b5a26355c2f18754d5a5b9b767373fc925ad074b SHA-256: 69d789ff04207428c6d235735f6bab5f2b715638d827de9c13ab02dd540fd1de
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=watch+time+traveler%2527s+wife+free+online PDF link annotation
    • http://chelamela.org/mapobosulisesogakibarivh0u.pdfIn PDF document text
    • http://slimerecipe.org/18365359487gffnn.pdfIn PDF document text
    • http://power-guard.shop/narrative_report_for_buwan_ng_wika_2018q45kq.pdfIn PDF document text
    • http://reduslimitaly-official.website/muslim_travel_guide_busanycn7l.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/mawejabamudobozepenu.pdfIn PDF document text
    • http://jepewadagamer.scienceontheweb.net/fokunebalitupokogagod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/85692502-e7b8-4bba-ab61-2c76e6a9da80/bissell_poweredge_pet_hard_floor_corded_vacuum_81l2a_same_as_81l2t.pdfIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/cinderella_jr_musical_script.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/generate_invoice_number_in_excel_spreadsheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/498c48e5-164a-442f-bc02-4474a4ae3da9/sword_art_online_fatal_bullet_gameplay_ps4.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/13382653222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5984b0-21c0-4c7c-b66b-3a95e43af0c9/jesus_healing_the_leper_verse.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/probation_reporting_center_ramsey_county.pdfIn PDF document text
    • https://8607b5f8-c2b2-49b7-a314-b17bd4efff40.filesusr.com/ugd/d99252_ae2f48e4670f43b0a80b03e476f518f6.pdf?index=trueIn PDF document text
    • https://e05653fc-386e-4c8b-889d-738aee72c63e.filesusr.com/ugd/62421a_d0009197bab34f679f47903fad2aac2d.pdf?index=trueIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_e0e9a87d6ece4e9a92c6a6d8035e60c0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vokeri/cbse_class_12_computer_science_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/490e4467-51bd-4e78-8b24-849f23793cdb/tipos_de_planes_de_pensiones_santander.pdfIn PDF document text
    • https://80c8fd16-4cf8-4f9f-b52b-d6c956df8f3b.filesusr.com/ugd/1a94e8_cd6604b78a4e49adacdcf031a4d5d033.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8183ac3-396f-49ea-865c-1a4ba05982a2/how_to_get_a_replacement_identification_card_online.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_off0000fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA53 5108 bytes
SHA-256: 46410d70657d95e00625a729870fbc770d9ef24d78a24ca9fa1f83fb49017773
font_01_sfnt_off00010b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B9D 14788 bytes
SHA-256: 54f9b2dabc76255e6d81ef3655237ad0c26051578b03518047973df8def9c429
font_02_sfnt_off00013842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13842 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333