Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f71cd64a79dec45…

MALICIOUS

PDF

66.4 KB Created: 2020-12-21 05:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fecdf693bfbb5b0eb8334a6f1817e801 SHA-1: 113d8702b29d3b3a261d0ee6319a8504dda8b55c SHA-256: 8f71cd64a79dec4541f9ce65945345071c9317d09f08c4eaefff12b2cbe998da
96 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a high-confidence ML classifier and ClamAV detection. The presence of an external URI pointing to 'trafffi.ru' suggests a phishing attempt, likely related to financial information. Although no scripts were explicitly extracted, the PDF structure and embedded URI indicate a malicious intent to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffi.ru/strik?utm_term=wizz+air+holdings+london+stock+exchange PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387411/normal_5fd216e3f2373.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494677/normal_5fcd74059efca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5f93d7ea8a045.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488100/normal_5fcb5ef241066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fafb9f6372a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451225/normal_5fac24d5310fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377408/normal_5fb2f5bf43cb4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8713afbccd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc298b02bbd7406581167d1/t/5fd171c123f2866aa37e1bff/1607561669708/38844373569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be93b3dc-6f2b-4f5b-9d69-81bc6f936a1e/65374440725.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd24b37849622016c4fdf9/1606231223966/sazofonajoletarubetel.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_off0000c64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64A 5396 bytes
SHA-256: 5c576df199b1b8fc2bfb2761943c79e5e9381c8e58a7d57279bfc9a4f758cc4d
font_01_sfnt_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 10692 bytes
SHA-256: 58bc92a32460b82d2d6692316defcb117297f93d066e8c8624a8d062de705e86