Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d86109aecdc244a…

MALICIOUS

PDF

67.7 KB Created: 2020-11-10 11:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c747b1344ea720d9d605d8cf64b9beac SHA-1: d5c9168506aaf3bc22810576e1f455da9d94db17 SHA-256: 3d86109aecdc244aa61140564c6bc3270dd07256ee3610ac5ffe6e23804615ae
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link to 'https://traffking.ru/strik?keyword=national+high+school+dance+festival+2020'. This URL is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?keyword=national+high+school+dance+festival+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4445321/normal_5fa5b9a80a1cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406168/normal_5f91d39ed9cb7.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/a79fa1e6-679a-4c80-b263-20dfdf192fa0/xumumogipuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6dca087-6855-4ce5-981f-23214728b746/parexogisodam.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/38062415406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65fb4d2e-72b1-4ecf-9604-ef48be10610f/mogozesaruborera.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94c74fbf-985c-4447-a785-b2f80530f25f/98198831189.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20b57073-3182-470f-8104-28e7c071f1b7/gasizatixafijutosaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4c9e125-50da-4389-8cfd-f0a7a9cdd905/2825966292.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/campus_life_christian.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_off0000cb46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB46 5488 bytes
SHA-256: 36f5e101d0930afecae81c8e9913ea0fe54452bbe7398bdb1f2303e26aca62c6
font_01_sfnt_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 10608 bytes
SHA-256: a8c51f395af433963c6526163041354284e0c989699715a3f93904798180b8d2