Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3cf498bb336935…

MALICIOUS

PDF

67.6 KB Created: 2020-11-19 03:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 90171f85cdaa3e7ca6c7cf788fd5ee78 SHA-1: 72b9a8fc21ce5e400d9f6d1bc5e7aefea28e6466 SHA-256: bc3cf498bb3369352d3a6d70f2f6ad10494362b49fffa13b148ff57ab4c825b9
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://cctraff.ru/123?utm_term=brevard+county+fl+2020+school+calendar In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9031774.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456685/normal_5fb49dc3a8079.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/6b70bb8426fc7.pdfIn PDF document text
    • https://lazetulomobepi.weebly.com/uploads/1/3/4/3/134326787/c470713bd1.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/zatazewoz/watiliforisobenut.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/moving_to_canada_from_usa_h1b.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/los_numeros_romanos_del_1_al_500.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/38479157355.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/61404969716.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1dabb16-a7ff-4b07-9a6d-727c244a45d1/sobakedesebaf.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/percy_jackson_luke_dies.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_off0000c7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D7 5596 bytes
SHA-256: 437de7daaaa39b78a3c1a3a19b6accf89a43344bcc51b613f0aece953c8fc9ef
font_01_sfnt_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 11432 bytes
SHA-256: 44138b44beb89a1cb87fe56c9d47e45e645c4a5830a2d1e37080f79ddacb5df3