Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ce7861aafcdc55a…

MALICIOUS

PDF

72.1 KB Created: 2021-02-13 23:00:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 27fe041e95b381684aea3ceb1bdef6bf SHA-1: 815de2c936119b81f41ef20c23aa408b07ba624c SHA-256: 7ce7861aafcdc55a0eb4fea6b3c86bc80e601a6d481e8bf5c722e4d3e7385cdd
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://crophysi.ru/wb?keyword=private%20pesticide%20applicator%20test%20answers%20iowa In PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/9hexhiZ/starfish_movie_2018.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407306/normal_5fd68c94cbd8c.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/cxhUIay/ancient_greek_war_strategy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370785/normal_5ff9a5483b114.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451205/normal_600af996b3825.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_5fe8858fad8ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460709/normal_5fca7575f05eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446151/normal_60097ce57270e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480880/normal_5fcb719b3931f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420451/normal_600701000ae1e.pdfIn PDF document text
    • https://cdn.sqhk.co/zupodejadofe/vjf0pji/brave_soul_shoes_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389616/normal_600f940718955.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485163/normal_60037a3fa491d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452392/normal_5fd26f4a28849.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504568/normal_60250d2ce1009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dbb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB6 5220 bytes
SHA-256: f535cd6c29f8b0f10f9a5adced3c50ca26924eb1330f866e6680035a0030d9c0
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 11172 bytes
SHA-256: 94bc5332fd9ea6eecbf7f591d9b017b179160622130ffd842d55b2a6cf49a70b