Malicious PDF — malware analysis report

Static analysis result for SHA-256 3be00e6fd64544a0…

MALICIOUS

PDF

66.9 KB Created: 2021-01-06 18:40:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 861662788e6f68d66397116faae323a4 SHA-1: 33a3a01b712928ff04f4d7c8bf442f643d68f405 SHA-256: 3be00e6fd64544a01d22c6add431e891e9f4bd9796c668892c46d80cf87ad901
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to distribute malicious content or engage in SEO manipulation for malicious purposes. The ClamAV detection and ML classifier further confirm the malicious nature of the file, likely related to 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://traffking.ru/123?utm_term=morrowind+patch+1.6+pl+chomikuj In PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/1251897.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/gfdticb/kofedurupusof.pdfIn PDF document text
    • https://kofudavobew.weebly.com/uploads/1/3/4/6/134602163/gozelebosakaxo.pdfIn PDF document text
    • https://pevaluxuduta.weebly.com/uploads/1/3/4/5/134502983/saxeto.pdfIn PDF document text
    • https://foxesusonixuna.weebly.com/uploads/1/3/5/2/135298742/9768259.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/wajibile/download_free_amortization_schedule_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae9e329a-f21f-453b-82b0-abff52295ee8/losunera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/669c6566-b232-457d-bc8d-604379731e4e/jawutorewavinoxeson.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/tektronix_oscilloscope_tds_1002_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/burnout_legends_psp_cso.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/54211342780.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3db8129f-c022-48f3-b619-40610dcf57c6/anderson_community_schools_administration_office.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_off0000ca59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 5612 bytes
SHA-256: 077c17e1d03007cc534ca2d9de6f9b59da8ba399239940b722799db736c29686
font_01_sfnt_off0000dd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6F 9752 bytes
SHA-256: aefe7d135adf95eaa61a5c073c2a7241f34390d09f8e6158a6c70117290a2981

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