Malicious PDF — malware analysis report

Static analysis result for SHA-256 24de888334d33836…

MALICIOUS

PDF

62.8 KB Created: 2020-11-24 07:36:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4f61f547cf4c50923cd7c27799b24579 SHA-1: 1e0e085b5aec0dee4db5fe65d9e1ffed6329575d SHA-256: 24de888334d33836ad776185caff78f119ccceb3b223d226b0866fc8c79de159
214 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, including a known malicious redirector. The heuristic firings indicate a malicious redirector link and a link farm, suggesting the document is designed to drive traffic to malicious infrastructure. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/aws?utm_term=carbonite+3.+3.+5+addon In PDF document text
    • https://dejaxunex.weebly.com/uploads/1/3/4/3/134318563/8607612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381532/normal_5f9014980b40e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408865/normal_5f94ec2dc8aa0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377101/normal_5fa5b92aa4017.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418401/normal_5fa1539ed4057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_5f963805893b4.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/nulijaxojujakawinaju.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420764/normal_5f9e3d085543f.pdfIn PDF document text
    • https://wogijelagorezu.weebly.com/uploads/1/3/4/0/134096035/b76ef10b.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/1a0947.pdfIn PDF document text
    • https://miwilokak.weebly.com/uploads/1/3/4/3/134375457/4236553.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/5e20c36439039.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5f8f92112c7a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f9007f647a55.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000b924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB924 4976 bytes
SHA-256: 77d733201a3fd14e48f7fd0dd0c34ceff6fd5da30b471103705fcd1e4465f9c7
font_01_sfnt_off0000ca1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1E 10744 bytes
SHA-256: 5544f555fb086f2c736c6aea43ad97574da271deedec8cfb887e80cdb5903fb5

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