Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5e57dfa4b88b94…

MALICIOUS

PDF

58.8 KB Created: 2020-12-23 01:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a4e4e599361c98fa654ea84d4fa964e3 SHA-1: 66373ac110b579ee4da95f60d50b2d7d7422661a SHA-256: 2d5e57dfa4b88b94d0d8cd273352228be24865c0622c3d1a8765f757684abd91
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://cctraff.ru/strik?utm_term=rebuilding+exchange+donations', is the primary indicator of malicious intent. The ML classifier and ClamAV detection further support the malicious nature of this file, suggesting it's a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 3

  • 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.
  • 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/strik?utm_term=rebuilding+exchange+donations In PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_5fa08c32e46a6.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/5fc00635ff13940aa23ad6dd/t/5fc3b120fa04221c7190c7a6/1606660384962/mifuseza.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/roluruluvusavupug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/843c6fe5-604c-464e-8330-ab236bffe339/geothermal_valley_coin_caches.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0ffab8139af037645cac7/t/5fc224843c6ccf69f3a68564/1606558855692/autosomal_recessive_pedigree_worksheet_answers_amoeba_sisters.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/3939802325.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/ucsd_ece_course_catalog.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/lowrance_hook2_7_mounting_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/77626751813.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/personal_animation_website_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/xevef.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/58918383763.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc380a327a199023ac5df36/t/5fc5f2654e98326c02de5972/1606808165535/i_come_with_a_sword_kjv.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA21 5204 bytes
SHA-256: d85807c61205efd5ec36e41421166476815818df2815b21dc92489acb6887e90

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