Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d4d940a8adb016…

MALICIOUS

PDF

67.2 KB Created: 2021-02-05 19:59:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 84431564768cc060991034c9df496c9a SHA-1: c2fc11080d193d1b99d81b288ed2896791139a3c SHA-256: 54d4d940a8adb0163d2bf923ad9125fa72257c9965dbcc70f7c1ee8782800631
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://yafferge.ru/wb?keyword=brattleboro%20reformer%20classifieds%20apartments In PDF document text
    • https://static.s123-cdn-static.com/uploads/4383137/normal_5fc6c9c20f3f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_600a4bbdd6452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493282/normal_5ffcccd1285d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_601b923f26c84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465259/normal_5fd0507456ac0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_6002dfa80d69e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471249/normal_6018d4424ce31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fd3788487db9.pdfIn PDF document text
    • http://zarabotok.space/precalculus_polynomial_worksheet_witl30uh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459467/normal_6002aaab6541d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451762/normal_6018512b19b54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juzatapanosuwi.rf.gd/jacoco-_maven-_plugin_generate_xml_report.pdfIn PDF document text
    • http://dibulazovila.rf.gd/81668534886.pdfIn PDF document text
    • http://rozipiliwune.epizy.com/akrep_sokmas.pdfIn PDF document text
    • http://gezibetaw.epizy.com/mifovijemikerekipe.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_off0000ca01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA01 5492 bytes
SHA-256: 3f991c9c54d8d11e5db70e44aed4a8981e970a7d0bbdd7987877001b7fc16698
font_01_sfnt_off0000dc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8F 10348 bytes
SHA-256: 6ee63b9b8442f674723ca726064aacb710cd614d7a7208ac80eaa45cbd9c3fb6