Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c041a63dfb1b868…

MALICIOUS

PDF

70.4 KB Created: 2020-12-27 13:23:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 874720969cd4f43ece4e0568b98c7cfe SHA-1: a54ee62d039e7830c41cad783e17bcd272143b81 SHA-256: 7c041a63dfb1b86878181d8b9cb99e334e8abe975ab9ffc8849d5d8a9e3dccb1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffmen.ru/shook?utm_term=nail+salon+near+me+open+early In PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fe6609d7255b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459917/normal_5fd03b771867b.pdfIn PDF document text
    • https://cdn.sqhk.co/leburogutu/jjjgijE/zenipasajirede.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371807/normal_5fdd713cac443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_5fc2bd0e30917.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459464/normal_5fcb7554c470c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414515/normal_5fbf069ad2d84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_5fb6a23c4ed7f.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/eGhfhcK/piri_best_audio_walking_tours.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485946/normal_5fe84861bb9fb.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/7fdf9131-05ee-43d8-b0ca-96f929e5e176/horus_heresy_books_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e55d072-9b50-499f-abc1-e74e8976c220/ielts_writing_samples_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d00922-5bd8-4804-876d-d8c04a2bfd66/the_walking_dead_a_new_frontier_ps3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa2a5df-6af3-4083-899a-d63ad8466b35/zoxopativikikoxuwefuxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad53a946-8140-4901-82da-96c615910415/did_eminem_copy_dream_on.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_off0000d789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD789 5036 bytes
SHA-256: d9b335877694a97cb191673a8eaed5873d23a2458e20429d4a10a23c40555bf1
font_01_sfnt_off0000e89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 10708 bytes
SHA-256: 71ea479191d04d2f9b1faee3e319831b49604516f85b6b10e38bac19f5892964

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