Malicious PDF — malware analysis report

Static analysis result for SHA-256 086b2feb060ebbfd…

MALICIOUS

PDF

79.4 KB Created: 2021-04-15 10:41:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0bd0c06ac1b5e2bafc21bfc6356cad16 SHA-1: bfe280ff0d205864036a64af59455d38ea61c064 SHA-256: 086b2feb060ebbfd3aadd4d69d0bac6b7ca94d7301c72470ec6a1f1c311a7a7c
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors, suggesting a link farm designed to drive traffic to malicious sites. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/strik?utm_term=adobe+premiere+elements+2019+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4502188/normal_60488ca95c41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473938/normal_6063d12ed387f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467593/normal_606e45ace0865.pdfIn PDF document text
    • https://waguxezemi.weebly.com/uploads/1/3/4/7/134703223/samuxogem.pdfIn PDF document text
    • http://wogaxuma.22web.org/auxilio_judicial_peru.pdfIn PDF document text
    • http://duwisodoginut.22web.org/reading_fluency_worksheets_3rd_grade.pdfIn PDF document text
    • https://xisovunegukizak.weebly.com/uploads/1/3/4/8/134868464/fenezawax_wikulef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379605/normal_5fe74c1fec301.pdfIn PDF document text
    • https://rizenuwav.weebly.com/uploads/1/3/4/3/134335920/godexojim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483589/normal_6037a4710d525.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445890/normal_5fcced8dee221.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378160/normal_5ff86ee723d7c.pdfIn PDF document text
    • https://waxebusesu.weebly.com/uploads/1/3/4/7/134770319/0b516c3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/378f91c6-08d1-4c8d-930c-9a82c348d240/berserk_manga_chapter_download.pdfIn PDF document text
    • https://c33c3ce4-fa2f-4f19-9477-7a801b41b29e.filesusr.com/ugd/ebbcbd_33ff27c0f4d74124a7c8701d9013073c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7eafd9-d9cf-44ae-b041-148a25b6022e/does_the_logitech_g29_work_on_pc.pdfIn PDF document text
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_489a64a5c0544237a70e72d42f99b0bb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d51bdac-4b9e-41b6-8fb2-800f88eca6df/gawogesimovurejexunuta.pdfIn PDF document text
    • https://d86ad34a-7df2-4f47-937b-a12ab5abc0fa.filesusr.com/ugd/8cbfce_30a3980b84cf4068a72ca4c6e4e9ea01.pdf?index=trueIn PDF document text
    • https://16fd3b15-5541-4454-9538-28daacbf497e.filesusr.com/ugd/e32576_2b0793ca27a44d1a8003be763184dbc7.pdf?index=trueIn 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_off0000f81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81C 5620 bytes
SHA-256: 536d535ddb3ed1efb43a0ef5a7f5d4065dc27a2e76cccc70dd7b75c241d8d3ef
font_01_sfnt_off00010b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B24 11072 bytes
SHA-256: ea2c7bbe423def86d97bc035b9ba883521918bed3a61c45cac03b541f86035e7