Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b986aafbfd7ccb9…

MALICIOUS

PDF

74.4 KB Created: 2020-12-25 17:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 43de97821f14c220330a93b7749befb8 SHA-1: e7b60b691cf5540c007431d8a9bb9ec8baa12f84 SHA-256: 5b986aafbfd7ccb9581a7341d950d3a67d6dc68a4d7f974d699837c5007e963b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The primary malicious URL, https://traffset.ru/strik?utm_term=cnc+machine+woodworking+for+sale, is likely intended to redirect users to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://traffset.ru/strik?utm_term=cnc+machine+woodworking+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406777/normal_5fb4512a24c1c.pdfIn PDF document text
    • https://kofasarafafe.weebly.com/uploads/1/3/5/3/135390193/fe6844cea217739.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404105/normal_5fc76f2429636.pdfIn PDF document text
    • https://fevonijapa.weebly.com/uploads/1/3/4/2/134234837/ziwovelib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_5fb3ff391da54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376382/normal_5fd9058cc0aba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451212/normal_5fc32cdf85f4b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387931/normal_5fe25e47b6490.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404953/normal_5fb585665b61c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410201/normal_5faec2604ee69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373797/normal_5f89a568ce2d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5fbf3b008b92f.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/xefezesebusu/spinal_vascular_malformation_icd_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c09fe38c-57b3-41e6-9ac4-4b21c26997d7/magup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8e8afc-c89b-4ca7-990c-9440c186c85b/jerinetigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f0e43f-65a0-4f90-9b63-88ac2fc153ab/les_registres_littraires_tableau_r.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/explosion_sound_sample.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/889202de-b4a3-4944-8957-07d15563c083/medidas_antropometricas_del_recien_nacido.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_off0000e739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE739 5496 bytes
SHA-256: ba24e98b6855df146e625b61daa1b436b4aa3d9c56f54de3f7e9fc4661f2fd5a
font_01_sfnt_off0000f9d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D4 10028 bytes
SHA-256: b80783177e43292181e0a888a7ccba08f72a10614f84286ebf35016fc46c9d37

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