Malicious PDF — malware analysis report

Static analysis result for SHA-256 4763acf06544f409…

MALICIOUS

PDF

69.2 KB Created: 2020-12-24 06:45:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 6089a413908c65e79fd7f31667e569bf SHA-1: e949476278895b24a25e4ec60065dc235e187062 SHA-256: 4763acf06544f409048a3df42fe603a33b50cc8072d32a2ae2163b02ddab1942
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. An external URI, 'https://trafffi.ru/strik?utm_term=pew+pew+madafakas+cat+meaning', was extracted, indicating a likely phishing or malware distribution attempt. Although no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, aligning with spearphishing tactics.

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=pew+pew+madafakas+cat+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5f8e717e7dac7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444643/normal_5f9ee132480b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367640/normal_5f87a4612e189.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/1601d90a-bb6e-4a72-b9e9-170440c93f87/t-mobile_zte_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/need_for_speed_edge_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2663c18-9fd4-402c-b3d8-63edef1b6860/xononibonugawanaxukuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d969185-c350-4f58-a90b-82f12100cdef/7466465642.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0016e4aa-a6b1-4c7c-8fe9-96e35db984cc/ebravo_download_full_movies_for_free_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57f54d27-4777-4a6d-a72c-06a19174cacd/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d279d9c-c135-4ad1-b57d-cf762293565d/armex_para_castillo_ficha_tecnica.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199454a1-2ad3-493d-9f68-120fa011dd19/dd_beyond_critical_hit.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/dead_by_daylight_survivors_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21abb1c-a1c8-4b20-beb7-76b4b158c885/38755908320.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f54649e9-3cda-4550-8cf4-59a35a7e91ac/sine_cosine_tangent_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC313 5180 bytes
SHA-256: 5b16bb999ae9634fc9e4c1f6a2a4b38c7ca5379997b4d1c4e71b4192b9154b99
font_01_sfnt_off0000d4b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B3 10884 bytes
SHA-256: f05df93375a1d697172baaa17ca66d317b1ce6bbe74b35aa89c25eafa6bc5e2e
font_02_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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