Malicious PDF — malware analysis report

Static analysis result for SHA-256 9addc87d21b3aad6…

MALICIOUS

PDF

62.1 KB Created: 2020-12-18 13:55:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 88c2877f0ed355f58b56507972c1cab7 SHA-1: 9dfea1f955acf359c6245fed596818d4d742cd24 SHA-256: 9addc87d21b3aad69e543748dbe96550102766c9e8ac61b58709bbd85530b5d8
214 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 known malicious redirector infrastructure or link farms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://cctraff.ru/strik?utm_term=rialto+movie+theatre+raleigh+nc In PDF document text
    • https://dimejozetef.weebly.com/uploads/1/3/1/0/131070151/3927027c19552ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404750/normal_5f971ee02b082.pdfIn PDF document text
    • https://wudizabilizone.weebly.com/uploads/1/3/4/7/134745746/zoravazirofemi-nirogizesexuwe-nefupafos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483870/normal_5fb29d6a074f4.pdfIn PDF document text
    • https://dedotomonifagax.weebly.com/uploads/1/3/1/6/131606429/1640334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376099/normal_5f97dde962f61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_5fd7b3ddeb48a.pdfIn PDF document text
    • https://dolujete.weebly.com/uploads/1/3/4/6/134674842/77e59ab2.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/rodigapigeta/79721328966.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/22324603028.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7b6f43483e57e2cf12c2/t/5fdc96fe38e73f2e3d788419/1608292095018/danny_boy_guitar_sheet_music.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc116c5bdb33045eec368a4/t/5fd1badbad61ab583189cad4/1607580380539/playroom_storage_ideas_ikea.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_off0000b503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB503 5104 bytes
SHA-256: 7e44fb622b86fe51514547de2d937e9b0a493f83d7dde052e6d153bcf90d6722
font_01_sfnt_off0000c63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC63F 11072 bytes
SHA-256: 0c81ac5fcec23ff0ce3721627789d7db8539e6987eb39e485a75d0d63d3d31ee

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