Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b30de1619dc755…

MALICIOUS

PDF

66.8 KB Created: 2021-01-01 00:41:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6369be72cc527049634a37ddc01b920c SHA-1: 81811f72ebe7a690197b7d86f3110fff08c3a169 SHA-256: 40b30de1619dc75522e2980c30c230070a51fed226abf57d278eabff2356738d
96 Risk Score

Malware Insights

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

The file is a PDF document that contains a malicious URL embedded in its metadata and body. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URL points to a suspicious domain, suggesting it's the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/strik?utm_term=skydive+houston+waller+tx+77484 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383444/normal_5f9fbf932dcff.pdfIn PDF document text
    • https://cdn.sqhk.co/sozaxejiv/WPG3eoI/12477977263.pdfIn PDF document text
    • https://cdn.sqhk.co/xidujefonari/1hcFXia/phoenix_arizona_craigslist_pets.pdfIn PDF document text
    • https://cdn.sqhk.co/susotizakaxe/6ijjjha/battleship_model_battleship.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380530/normal_5fe759a0425b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5fcb57cd70269.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373779/normal_5fcd6804b80ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_5fe92f1f1fd78.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389353/normal_5f92d18f3d0b6.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/vudivuzakal/google_chat_format_text.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a0b176-699c-40cb-80d4-f66df36da423/tangled_the_series_season_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/293f5f60-6a0e-4ecf-9f5d-d08da7270931/iata_book.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_off0000c780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC780 5764 bytes
SHA-256: 6839f384ca15faf86a8aa8401b205d184720deeebb2ddd5d573c08da9fdf0b02
font_01_sfnt_off0000db44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB44 10380 bytes
SHA-256: 94cb6ad9d56a4dc036de09d84747d59f13c13f9fc9074706a58fc2c506505914