Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cd1a6bfce4df2d0…

MALICIOUS

PDF

71.6 KB Created: 2020-12-31 18:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 07433a6366d148fcff6a08eddd1b6e0b SHA-1: 00d3c0b6e0bec15302290c390d40529a19c772df SHA-256: 7cd1a6bfce4df2d0a2fe3463efdfa05e3cc7e7f5f1077737a8a33d4f084f95ef
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a link that redirects to known malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, suggests a lure related to 'college football championship rings for sale'. The ML classifier and ClamAV detection further confirm its malicious nature. The primary attack vector appears to be a phishing attempt via a malicious attachment.

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://gettraff.ru/strik?utm_term=college+football+championship+rings+for+sale In PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/fesukuviter.pdfIn PDF document text
    • https://lobumemimakagom.weebly.com/uploads/1/3/3/9/133999871/891c9218.pdfIn PDF document text
    • https://cdn.sqhk.co/nutakurij/J8wZigc/du_application_portal_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390661/normal_5fe7de297b449.pdfIn PDF document text
    • https://remofixar.weebly.com/uploads/1/3/0/7/130776049/569585.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/ecba4f05-a7c6-4c13-8fb1-4937544fd168/17903265894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3ca6bee-377a-4bb6-b372-268b9d458cbb/najuvofotavisilime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5367396-b4de-4d57-b15f-fb427affba9c/hubsan_x4_fpv_mini_quadcopter_plus_2019edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f986669-9ae7-4035-b5ca-b08d2b3c94df/xotajobopot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20cb9f2-ba84-4cad-a899-48a35d4ad0e7/how_to_write_a_statement_of_faith_for_employment.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_off0000db6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB6D 5476 bytes
SHA-256: 841b3c44c8f95920c078c0cda6ac0e9fbcda1199de786dedb58f99349c43c882
font_01_sfnt_off0000ede0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE0 10540 bytes
SHA-256: 87f18e277c8439830b496d773f35359c763257f13acb4cfd620890a173e4a4eb

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