Malicious PDF — malware analysis report

Static analysis result for SHA-256 617ea0f12a5c9247…

MALICIOUS

PDF

74.5 KB Created: 2021-03-11 12:05:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5629f818f4c758096f1147a7db0b51cf SHA-1: 59a1c3e4f38c9915fd36508f208270381eeb673a SHA-256: 617ea0f12a5c9247a4be2c8fa5f770ad40d3515530fcfa565d66def77602d435
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://dafemum.ru/award?keyword=search+pdf+files+online In PDF document text
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5feca16ee8955.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459188/normal_600bc8931af0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375525/normal_600e6e375aa4c.pdfIn PDF document text
    • http://mybiol.site/define_tipping_point_economicsn6van.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366031/normal_5fdf063f0c68c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376369/normal_600b3b72a8b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489835/normal_60230a6433175.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393193/normal_5fd7b29ab2e69.pdfIn PDF document text
    • http://classkaod.ru/bufapadudovisuvojux2pvhz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5fcd8e9a6f1b2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452618/normal_5ffccf925895e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468253/normal_603d60afc7bcd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_602455daba759.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485322/normal_6021cbc7cbdd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_602e44c7cf5cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://binasizula.rf.gd/97025579549.pdfIn PDF document text
    • http://suxezuvovuwezew.rf.gd/how_to_set_up_a_rod_and_reel_for_catfish.pdfIn PDF document text
    • http://tupusivamiguta.rf.gd/39653890868.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_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 5344 bytes
SHA-256: 446f5e39f0f192096b28bba31843a5eba0ab88618f4b8170a6aea28aa738f341
font_01_sfnt_off0000fa0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0E 10308 bytes
SHA-256: 3ea600c8999101965eff33569a5d04ed26a4e18bb83919ec1d2bd13d1bea49d5