Malicious PDF — malware analysis report

Static analysis result for SHA-256 f827918cd36fdcd9…

MALICIOUS

PDF

68.1 KB Created: 2021-02-20 00:12:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c918f612d83db0e2c827bca0fb44d3c7 SHA-1: e32143b48b3968d641650512fc6153b22e85a023 SHA-256: f827918cd36fdcd9db54dece06978cb83d31cba145333091d0eeafcfc0b049ad
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/wix?keyword=thomas+rhett+notice+acoustic In PDF document text
    • http://zadudafarom.22web.org/7044161499.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_601d6114cfd31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457011/normal_602c3c563adcf.pdfIn PDF document text
    • https://cdn.sqhk.co/tisumusef/bdcehih/40289673939.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404124/normal_5fc6d536711e8.pdfIn PDF document text
    • https://cdn.sqhk.co/besimiwi/cgijXS7/5926288246.pdfIn PDF document text
    • https://cdn.sqhk.co/xonepogafix/cic6jg8/xemimimojolunamogukazava.pdfIn PDF document text
    • http://vufakitupo.22web.org/best_stock_for_new_investors_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/hajLpjj/fly_racing_mountain_bike_helmet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416939/normal_5fffc21f78309.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/58jhyjb/52102597880.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/gitipelut/pdf_file_convert_to_excel_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/spotify_hack_apk_ios.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/best_remington_700_stock_upgrade.pdfIn PDF document text
    • http://serinuzosazojup.epizy.com/the_illustrated_easy_way_to_stop_smoking.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/minecraft_1._14_apk_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/35330288531.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_off0000d0f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F8 4956 bytes
SHA-256: a914729801a83684c8532f202df9669ca5daee42512fbaa44f89484a960a930e
font_01_sfnt_off0000e1a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A1 9920 bytes
SHA-256: 78fde8a6de99aa7214f3fba3de9b81f322830425625f80ff3b3a905d1b8c2c1e