Malicious PDF — malware analysis report

Static analysis result for SHA-256 65c32ff5d5aa8409…

MALICIOUS

PDF

69.2 KB Created: 2020-12-18 07:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ecbeddbd6908527ecdb892066d640797 SHA-1: 658c40eef2b54864058c4fdd0a9d8c13bee139c7 SHA-256: 65c32ff5d5aa84094cd7ace3ffc57d04ba31459095a7feb7d78bea842df40fd0
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL `https://cctraff.ru/strik?utm_term=971+area+code` is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains text fragments that might be intended to trick the user into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://cctraff.ru/strik?utm_term=971+area+code In PDF document text
    • https://cdn-cms.f-static.net/uploads/4485710/normal_5fb259b5077cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_5fa02be2b8cb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472481/normal_5fc7f5d1afa76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5fa66867f0b9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dukajevo/project_gantt_chart_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10aaaf9866f3fd2d521c0/t/5fc17f0a9ee0f32b878b9242/1606516491979/97049492350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f51f9c8-0878-46f3-89e4-94d856c4f7f1/radha_and_krishnan.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e46f24b06a7eb3ff1788/t/5fc1af729d79364840cd17aa/1606528883823/69868613585.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc080f7bf71053ccb0e3c67/t/5fc22bdd9ee0f32b879bfeb7/1606560734737/77058216610.pdfIn PDF document text
    • https://s3.amazonaws.com/pirosisob/download_the_confession_john_grisham.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a6a1be9b6939512b3ad5/t/5fd0857106d21916ed6f6820/1607501169793/84438101755.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59ef75bcb0228a2a2afad/t/5fcca247a87f9f1b19d49049/1607246408239/basketball_head_games_championship.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/staff_annual_appraisal_template.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_off0000d413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD413 4916 bytes
SHA-256: 5245b09909cb0a5b0c618f2fea1b8e54d97ab109235123a84a34e00ff2e234e7
font_01_sfnt_off0000e4e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E4 10288 bytes
SHA-256: 85bb7ce19694a8257b848073b7980cdb8cbc392122ca20dd1709ec515eb814d5

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